Dyadyuchenko, L. V.’s team published research in Chemistry of Heterocyclic Compounds in 2004 | CAS: 66662-48-4

2-Chloro-4,6-dimethylnicotinic acid(cas: 66662-48-4) belongs to pyridine. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. As ligands, solvents, and catalysts they facilitate reactions; thus descriptions of these new ligands and their applications abound each year.Related Products of 66662-48-4

Related Products of 66662-48-4On March 31, 2004, Dyadyuchenko, L. V.; Strelkov, V. D.; Mikhailichenko, S. N.; Zaplishny, V. N. published an article in Chemistry of Heterocyclic Compounds. The article was 《Synthesis of some halogen- and nitro-substituted nicotinic acids and their fragmentation under electron impact》. The article mentions the following:

Features of electrophilic and nucleophilic substitution under chlorination and nitration reaction conditions have been investigated for 6-hydroxy- and 6-methyl-3-cyano-4-methyl-2(1H)-pyridones. The polychloro- and nitro-substituted 3-cyano-4-methylpyridines obtained were used as synthons in the synthesis of some polyhalo- and nitro-substituted nicotinic acids and their amides. The fragmentation pathways of the synthesized compounds under electron impact have been studied. In the part of experimental materials, we found many familiar compounds, such as 2-Chloro-4,6-dimethylnicotinic acid(cas: 66662-48-4Related Products of 66662-48-4)

2-Chloro-4,6-dimethylnicotinic acid(cas: 66662-48-4) belongs to pyridine. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. As ligands, solvents, and catalysts they facilitate reactions; thus descriptions of these new ligands and their applications abound each year.Related Products of 66662-48-4

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Brown, Thomas H.’s team published research in European Journal of Medicinal Chemistry in 1988 | CAS: 7116-36-1

Ethyl 3-(4-chlorophenyl)propanoate(cas: 7116-36-1) belongs to organochlorine compounds. Alkanes and aryl alkanes may be chlorinated under free radical conditions, with UV light. Name: Ethyl 3-(4-chlorophenyl)propanoate However, the extent of chlorination is difficult to control. Aryl chlorides may be prepared by the Friedel-Crafts halogenation, using chlorine and a Lewis acid catalyst.

Brown, Thomas H.; Blakemore, Robert C.; Durant, Graham J.; Emmett, John C.; Ganellin, C. Robin; Parsons, Michael E.; Rawlings, D. Anthony; Walker, Terence F. published their research in European Journal of Medicinal Chemistry on February 29 ,1988. The article was titled 《Isocytosine H2-receptor histamine antagonists. I. Oxmetidine and related compounds》.Name: Ethyl 3-(4-chlorophenyl)propanoate The article contains the following contents:

2-[2-(5-Methyl-4-imidazolylmethylthio)ethylamino]-4-pyrimidones I (R = H, Me, PhO, substituted benzyl, etc.; R1 = H, Me, Pr, PhCH2) were prepared via substitution of (methylthio)pyrimidinones with 5-methyl-4-[(2-aminomethyl)thiomethyl]imidazole. The model compound I (R = R1 = H) has modest H2-antagonist activity as shown by its ability to antagonize histamine-stimulated tachycardia in guinea pig right atrium in vitro and inhibit histamine-stimulated gastric acid secretion in the lumen-perfused stomach of the anesthetized rat. Investigation of the effect of substituents in the pyrimidone ring showed that suitable substitution at the 5-position gave compounds with greatly increased activity, whereas substituents at other positions in the ring were not favorable for activity. Some structure-activity and structure-toxicity correlations are discussed. The experimental part of the paper was very detailed, including the reaction process of Ethyl 3-(4-chlorophenyl)propanoate(cas: 7116-36-1Name: Ethyl 3-(4-chlorophenyl)propanoate)

Ethyl 3-(4-chlorophenyl)propanoate(cas: 7116-36-1) belongs to organochlorine compounds. Alkanes and aryl alkanes may be chlorinated under free radical conditions, with UV light. Name: Ethyl 3-(4-chlorophenyl)propanoate However, the extent of chlorination is difficult to control. Aryl chlorides may be prepared by the Friedel-Crafts halogenation, using chlorine and a Lewis acid catalyst.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

da Cunha, Gislaine A.’s team published research in Journal of Inorganic Biochemistry in 2020 | CAS: 18987-59-2

Di-μ-chlorobis[2-[(dimethylamino)methyl]phenyl-C,N]dipalladium(II)(cas: 18987-59-2) belongs to organochlorine compounds. The wide structural variety and divergent chemical properties of organochlorides lead to a broad range of names, applications, and properties. Organochlorine compounds have wide use in many applications, though some are of profound environmental concern, with TCDD being one of the most notorious.Product Details of 18987-59-2

da Cunha, Gislaine A.; de Souza, Ronan F. F.; de Farias, Renan L.; Moreira, Mariete B.; Silva, Debora E. S.; Zanetti, Renan D.; Garcia, Daniel M.; Spindola, Daniel G.; Michelin, Luis F. G.; Bincoletto, Claudia; de Souza, Aline A.; Antunes, Alyne A.; Judice, Wagner A. de S.; Leitao, Renan C. F.; Deflon, Victor M.; Mauro, Antonio E.; Netto, Adelino V. G. published their research in Journal of Inorganic Biochemistry on February 29 ,2020. The article was titled 《Cyclopalladated compounds containing 2,6-lutidine: Synthesis, spectral and biological studies》.Product Details of 18987-59-2 The article contains the following contents:

Bridge splitting reactions between [Pd(C2,N-dmba)(μ-X)]2 (dmba = N,N-dimethylbenzylamine; X = Cl, I, N3, NCO) and 2,6-lutidine (lut) in the 1:2 molar ratio at room temperature afforded cyclopalladated compounds of general formulas [Pd(C2,N-dmba)(X)(lut)] {X = Cl- (1), I- (2), NNN- (3), NCO- (4)}, which were characterized by elemental analyses and IR, 1H NMR spectroscopy. The mol. structures of all synthesized palladacycles have been solved by single-crystal x-ray crystallog. The cytotoxicity of the cyclopalladated compounds has been evaluated against a panel of murine {mammary carcinoma (4T1) and melanoma (B16F10-Nex2)} and human {melanoma (A2058, SK-MEL-110 and SK-MEL-5)} tumor cell lines. All complexes were about 10 to 100-fold more active than cisplatin, depending on the tested tumor cell line. For comparison purposes, the cytotoxic effects of 1-4 towards human lung fibroblasts (MRC-5) have also been tested. The late apoptosis-inducing properties of 1-4 compounds in SK-MEL-5 cells were verified 24 h incubation using annexin V-Fluorescein isothiocyanate (FITC)/propidium iodide (PI). The binding properties of the model compound 1 on human serum albumin (HSA) and calf thymus DNA (ct-DNA) have been studied using CD and fluorescence spectroscopy. Docking simulations have been carried out to gain more information about the interaction of the palladacycle and HSA. The ability of compounds 1-4 to inhibit the activity of cathepsin B and L has also been investigated in this work.Di-μ-chlorobis[2-[(dimethylamino)methyl]phenyl-C,N]dipalladium(II)(cas: 18987-59-2Product Details of 18987-59-2) was used in this study.

Di-μ-chlorobis[2-[(dimethylamino)methyl]phenyl-C,N]dipalladium(II)(cas: 18987-59-2) belongs to organochlorine compounds. The wide structural variety and divergent chemical properties of organochlorides lead to a broad range of names, applications, and properties. Organochlorine compounds have wide use in many applications, though some are of profound environmental concern, with TCDD being one of the most notorious.Product Details of 18987-59-2

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Hassan, Muhammad Murtaza’s team published research in Journal of Medicinal Chemistry in 2020 | CAS: 21900-36-7

3-(tert-Butyl)benzoyl chloride(cas: 21900-36-7) belongs to organochlorine compounds. The wide structural variety and divergent chemical properties of organochlorides lead to a broad range of names, applications, and properties. Aliphatic organochlorides are often alkylating agents as chlorine can act as a leaving group, which can result in cellular damage.Name: 3-(tert-Butyl)benzoyl chloride

Hassan, Muhammad Murtaza; Israelian, Johan; Nawar, Nabanita; Ganda, Giovanni; Manaswiyoungkul, Pimyupa; Raouf, Yasir S.; Armstrong, David; Sedighi, Abootaleb; Olaoye, Olasunkanmi O.; Erdogan, Fettah; Cabral, Aaron D.; Angeles, Fabrizio; Altintas, Rabia; de Araujo, Elvin D.; Gunning, Patrick T. published their research in Journal of Medicinal Chemistry on August 13 ,2020. The article was titled 《Characterization of Conformationally Constrained Benzanilide Scaffolds for Potent and Selective HDAC8 Targeting》.Name: 3-(tert-Butyl)benzoyl chloride The article contains the following contents:

Histone deacetylases (HDACs) are an attractive therapeutic target for a variety of human diseases. Currently, all four FDA-approved HDAC-targeting drugs are nonselective, pan-HDAC inhibitors, exhibiting adverse side effects at therapeutic doses. Although selective HDAC inhibition has been proposed to mitigate toxicity, the targeted catalytic domains are highly conserved. Herein, a series of rationally designed, conformationally constrained, benzanilide foldamers which selectively bind the catalytic tunnel of HDAC8 is described. The series includes benzanilides, MMH371, MMH409, and MMH410, which exhibit potent in vitro HDAC8 activity (IC50 = 66, 23, and 66 nM, resp.) and up to 410-fold selectivity for HDAC8 over the next targeted HDAC. Exptl. and computational analyses of the benzanilide structure docked with human HDAC8 enzyme showed the adoption of a low-energy L-shaped conformer that favors HDAC8 selectivity. The conformationally constrained HDAC8 inhibitors present an alternative biol. probe for further determining the clin. utility and safety of pharmacol. knockdown of HDAC8 in diseased cells. The results came from multiple reactions, including the reaction of 3-(tert-Butyl)benzoyl chloride(cas: 21900-36-7Name: 3-(tert-Butyl)benzoyl chloride)

3-(tert-Butyl)benzoyl chloride(cas: 21900-36-7) belongs to organochlorine compounds. The wide structural variety and divergent chemical properties of organochlorides lead to a broad range of names, applications, and properties. Aliphatic organochlorides are often alkylating agents as chlorine can act as a leaving group, which can result in cellular damage.Name: 3-(tert-Butyl)benzoyl chloride

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Flammang, Michel’s team published research in European Journal of Medicinal Chemistry in 1976 | CAS: 7116-36-1

Ethyl 3-(4-chlorophenyl)propanoate(cas: 7116-36-1) belongs to organochlorine compounds. The wide structural variety and divergent chemical properties of organochlorides lead to a broad range of names, applications, and properties. Organochlorine compounds have wide use in many applications, though some are of profound environmental concern, with TCDD being one of the most notorious.Quality Control of Ethyl 3-(4-chlorophenyl)propanoate

In 1976,European Journal of Medicinal Chemistry included an article by Flammang, Michel; Wermuth, Camille G.. Quality Control of Ethyl 3-(4-chlorophenyl)propanoate. The article was titled 《2,3-Benzodiazepine systems. II. 4-Oxo-3,5-dihydro(4H)-2,3-benzodiazepines. Synthesis and pharmacological study》. The information in the text is summarized as follows:

Benzodiazepinones I (R = H, Cl; R1 = H, Me; R2 = H, Me, morpholinoethyl, morpholinopropyl, pyrrolidinoethyl; R3 = H, OMe, Cl) (11 compounds) were prepared by treating 4-RC6H4CHO with CH2(CO2H)2, cyclizing 4-RC6H4CH:CHCO2H, treating II (X = O) with 4-R3C6H4MgBr, dehydrating II (X = OH,C6H4R3-4), oxidizing the indenes, and condensing 4,2-R(4-R3C6H4CO)C6H3CH2CO2H with R2NHNH2. I had much lower tranquilizing activity than diazepam. In the experimental materials used by the author, we found Ethyl 3-(4-chlorophenyl)propanoate(cas: 7116-36-1Quality Control of Ethyl 3-(4-chlorophenyl)propanoate)

Ethyl 3-(4-chlorophenyl)propanoate(cas: 7116-36-1) belongs to organochlorine compounds. The wide structural variety and divergent chemical properties of organochlorides lead to a broad range of names, applications, and properties. Organochlorine compounds have wide use in many applications, though some are of profound environmental concern, with TCDD being one of the most notorious.Quality Control of Ethyl 3-(4-chlorophenyl)propanoate

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Skerlj, Renato’s team published research in Bioorganic & Medicinal Chemistry Letters in 2011 | CAS: 54453-94-0

Ethyl 6-chloro-2,4-dimethylnicotinate(cas: 54453-94-0) belongs to pyridine. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. As ligands, solvents, and catalysts they facilitate reactions; thus descriptions of these new ligands and their applications abound each year.Reference of Ethyl 6-chloro-2,4-dimethylnicotinate

The author of 《Design and synthesis of pyridin-2-ylmethylaminopiperidin-1-ylbutyl amide CCR5 antagonists that are potent inhibitors of M-tropic (R5) HIV-1 replication》 were Skerlj, Renato; Bridger, Gary; Zhou, Yuanxi; Bourque, Elyse; McEachern, Ernest; Langille, Jonathan; Harwig, Curtis; Veale, Duane; Yang, Wen; Li, Tongshong; Zhu, Yongbao; Bey, Michael; Baird, Ian; Sartori, Michael; Metz, Markus; Mosi, Renee; Nelson, Kim; Bodart, Veronique; Wong, Rebecca; Fricker, Simon; MacFarland, Ron; Huskens, Dana; Schols, Dominique. And the article was published in Bioorganic & Medicinal Chemistry Letters in 2011. Reference of Ethyl 6-chloro-2,4-dimethylnicotinate The author mentioned the following in the article:

A series of CCR5 antagonists, e.g. I, were optimized for potent inhibition of R5 HIV-1 replication in peripheral blood mononuclear cells. Compounds that met acceptable ADME criteria, selectivity, human plasma protein binding, potency shift in the presence of α-glycoprotein were evaluated in rat and dog pharmacokinetics. In the experimental materials used by the author, we found Ethyl 6-chloro-2,4-dimethylnicotinate(cas: 54453-94-0Reference of Ethyl 6-chloro-2,4-dimethylnicotinate)

Ethyl 6-chloro-2,4-dimethylnicotinate(cas: 54453-94-0) belongs to pyridine. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. As ligands, solvents, and catalysts they facilitate reactions; thus descriptions of these new ligands and their applications abound each year.Reference of Ethyl 6-chloro-2,4-dimethylnicotinate

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Feist, John D.’s team published research in Journal of the American Chemical Society in 2020 | CAS: 172222-30-9

Benzylidenebis(tricyclohexylphosphine)dichlororuthenium(cas: 172222-30-9) is a ruthenium-based olefin metathesis catalyst. It is useful for olefin cross metathesis (CM) and ring closing metathesis (RCM) of terminal olefins under a variety of reactions conditions, and so on.Safety of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium

《Enol Ethers Are Effective Monomers for Ring-Opening Metathesis Polymerization: Synthesis of Degradable and Depolymerizable Poly(2,3-dihydrofuran)》 was written by Feist, John D.; Xia, Yan. Safety of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium And the article was included in Journal of the American Chemical Society in 2020. The article conveys some information:

Enol ethers are widely used as quenching reagents for Grubbs catalysts. However, we report the surprisingly effective ring-opening metathesis polymerization (ROMP) of cyclic enol ethers, because the resulting electron-rich ruthenium alkylidene complex remains active toward metathesis of electron-rich olefins, despite its deactivation toward hydrocarbon olefins. We demonstrate the first example of ROMP of cyclic enol ethers, using 2,3-dihydrofuran as the monomer, producing a new type of degradable and depolymerizable poly(enol ether). The polymers exhibited perfect regioregularity, and their mol. weights can be regulated by the loading of Grubbs initiators or by the use of a linear vinyl ether as the chain transfer agent. We also developed protocols to deactivate the catalyst following metathesis of enol ethers and cleave the catalyst off the resulting polymers using H2O2 oxidation The resulting poly(dihydrofuran) can be recycled to monomer via depolymerization with Grubbs catalyst or degraded to small mols. by hydrolysis under acidic conditions. This work opens exciting opportunities for a new class of ROMP monomers that lead to degradable polymers. The experimental part of the paper was very detailed, including the reaction process of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium(cas: 172222-30-9Safety of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium)

Benzylidenebis(tricyclohexylphosphine)dichlororuthenium(cas: 172222-30-9) is a ruthenium-based olefin metathesis catalyst. It is useful for olefin cross metathesis (CM) and ring closing metathesis (RCM) of terminal olefins under a variety of reactions conditions, and so on.Safety of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Diao, Peng-Cheng’s team published research in Bioorganic & Medicinal Chemistry Letters in 2020 | CAS: 5781-53-3

Methyl 2-chloro-2-oxoacetate(cas: 5781-53-3) belongs to acyl chlorides. Lacking the ability to form hydrogen bonds, acyl chlorides have lower boiling and melting points than similar carboxylic acids. For example, acetic acid boils at 118 °C, whereas acetyl chloride boils at 51 °C. Like most carbonyl compounds, infrared spectroscopy reveals a band near 1750 cm−1.Electric Literature of C3H3ClO3

《Design, synthesis and biological evaluation of novel indole-based oxalamide and aminoacetamide derivatives as tubulin polymerization inhibitors》 was written by Diao, Peng-Cheng; Jian, Xie-Er; Chen, Peng; Huang, Chuan; Yin, Jie; Huang, Jie Chun; Li, Jun-Sheng; Zhao, Pei-Liang. Electric Literature of C3H3ClO3 And the article was included in Bioorganic & Medicinal Chemistry Letters in 2020. The article conveys some information:

A series of novel indole-based oxalamides I [R1 = H, Me, Cl; R2 = H, C(O)Me, C(O)C6H5, cyclopropanecarbonyl, furan-2-carbonyl; X = N, CH] and aminoacetamides II [R3 = H, Cl; R4 = C(O)C6H5, 4-MeC6H4C(O), 4-MeOC6H4C(O); R5 = H, 2-Me, 4-Me, 4-F, 4-MeO, 3,4,5-tri-MeO] were designed, synthesized, and evaluated for antiproliferative activities. Preliminary results revealed that compound II [R3 = Cl; R4 = C(O)C6H5; R5 = H] exhibited significant antiproliferative effect against PC-3, HeLa and HCT-116 cell lines. Flow cytometric anal. of the cell cycle demonstrated the compound II [R3 = Cl; R4 = C(O)C6H5; R5 = H] induced the cell cycle arrest at G2/M phase in HeLa cell lines. Immunocytochem. revealed loss of intact microtubule structure in cells treated with compound II [R3 = Cl; R4 = C(O)C6H5; R5 = H] and inhibition of tubulin polymerization Addnl., mol. docking anal. suggested that compound II [R3 = Cl; R4 = C(O)C6H5; R5 = H] formed stable interactions in the colchicine-binding site of tubulin. These preliminary results demonstrated that a new class of novel indole-based oxalamide and aminoacetamide derivatives described in the investigation could be developed as potential scaffolds to new anticancer agents. In addition to this study using Methyl 2-chloro-2-oxoacetate, there are many other studies that have used Methyl 2-chloro-2-oxoacetate(cas: 5781-53-3Electric Literature of C3H3ClO3) was used in this study.

Methyl 2-chloro-2-oxoacetate(cas: 5781-53-3) belongs to acyl chlorides. Lacking the ability to form hydrogen bonds, acyl chlorides have lower boiling and melting points than similar carboxylic acids. For example, acetic acid boils at 118 °C, whereas acetyl chloride boils at 51 °C. Like most carbonyl compounds, infrared spectroscopy reveals a band near 1750 cm−1.Electric Literature of C3H3ClO3

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Che, Zhi-Ping’s team published research in Journal of Asian Natural Products Research in 2020 | CAS: 16629-19-9

Thiophene-2-sulfonyl chloride(cas: 16629-19-9) is a member of sulfonyl chlorides. Sulfonyl chlorides are reactive sulfonic acid derivatives similar in properties and reactivity to acid chlorides of carboxylates. The sulfonic acid group, however, is a highly hindered molecule, containing a tetrahedral configuration of substituents. Reference of Thiophene-2-sulfonyl chloride

《Synthesis and insecticidal activity of sulfonate derivatives of sesamol against Mythimna separata in vivo》 was written by Che, Zhi-Ping; Yang, Jin-Ming; Shan, Xi-Jie; Tian, Yue-E.; Liu, Sheng-Ming; Lin, Xiao-Min; Jiang, Jia; Hu, Mei; Chen, Gen-Qiang. Reference of Thiophene-2-sulfonyl chloride And the article was included in Journal of Asian Natural Products Research in 2020. The article conveys some information:

A series of sulfonate derivatives of sesamol were synthesized and evaluated for their insecticidal activity against a crop-threatening agricultural pest, the pre-third-instar larvae of Mythimna separata in vivo. Among all the target compounds, compounds , , and exhibited more promising insecticidal activity than sesamol and toosendanin, and the final mortality rates (FMRs) of , , , , and toosendanin were 60.7%/60.7%/67.9%/53.6%/32.1%/50.0%, resp. Especially compound exhibited the most potent insecticidal activity with FMRs of 67.9%. This suggested that a 4-fluorophenylsulfonyl group introduced at the hydroxyl position of sesamol was necessary for obtaining the most potent compound The experimental process involved the reaction of Thiophene-2-sulfonyl chloride(cas: 16629-19-9Reference of Thiophene-2-sulfonyl chloride)

Thiophene-2-sulfonyl chloride(cas: 16629-19-9) is a member of sulfonyl chlorides. Sulfonyl chlorides are reactive sulfonic acid derivatives similar in properties and reactivity to acid chlorides of carboxylates. The sulfonic acid group, however, is a highly hindered molecule, containing a tetrahedral configuration of substituents. Reference of Thiophene-2-sulfonyl chloride

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Thirupataiah, B.’s team published research in European Journal of Medicinal Chemistry in 2021 | CAS: 16629-19-9

Thiophene-2-sulfonyl chloride(cas: 16629-19-9) is a member of sulfonyl chlorides. Sulfonyl chlorides are reactive sulfonic acid derivatives similar in properties and reactivity to acid chlorides of carboxylates. The sulfonic acid group, however, is a highly hindered molecule, containing a tetrahedral configuration of substituents. Reference of Thiophene-2-sulfonyl chloride

Thirupataiah, B.; Mounika, Guntipally; Reddy, Gangireddy Sujeevan; Kumar, Jetta Sandeep; Hossain, Kazi Amirul; Medishetti, Raghavender; Samarpita, Snigdha; Rasool, Mahaboobkhan; Mudgal, Jayesh; Mathew, Jessy E.; Shenoy, Gautham G.; Rao, C. Mallikarjuna; Chatti, Kiranam; Parsa, Kishore V. L.; Pal, Manojit published their research in European Journal of Medicinal Chemistry in 2021. The article was titled 《PdCl2-catalyzed synthesis of a new class of isocoumarin derivatives containing aminosulfonyl / aminocarboxamide moiety: First identification of a isocoumarin based PDE4 inhibitor》.Reference of Thiophene-2-sulfonyl chloride The article contains the following contents:

In this effort the non-PDE4 inhibitor isocoumarins were transformed into the promising inhibitors via introducing an aminosulfonyl/aminocarboxamide moiety to the C-3 benzene ring attached to the isocoumarin framework. This new class of isocoumarins were synthesized via a PdCl2-catalyzed construction of the 4-allyl substituted 3-aryl isocoumarin ring I (X = SO2Me, SO2Ph, COPh, etc.; R1 = H, 6-Cl, 7-F) starting from the appropriate 2-alkynyl benzamide derivative Several compounds showed good inhibition of PDE4B in vitro and the SAR indicated superiority of aminosulfonamide moiety over aminocarboxamide in terms of PDE4B inhibition. Two compounds I (X = SO2Ph; R1 = 7-F) and I (X = SO2(thiophen-2-yl); R1 = 7-F) with PDE4B IC50 = 0.43 +/= 0.11 and 0.54 +/= 0.19μM and >/= 2-fold selectivity over PDE4D emerged as initial hits. The participation of aminosulfonamide moiety in PDE4B inhibition and the reason for selectivity though moderate shown by I (X = SO2Ph; R1 = 7-F) and I (X = SO2(thiophen-2-yl); R1 = 7-F) was revealed by the in silico docking studies. In view of potential usefulness of moderately selective PDE4B inhibitors the compound I (X = SO2(thiophen-2-yl); R1 = 7-F) was further evaluated in adjuvant induced arthritic rats. Thus, the isocoumarin I (X = SO2(thiophen-2-yl); R1 = 7-F) emerged as a new, safe and moderately selective PDE4B inhibitor could be useful for inflammatory diseases possibly including COVID-19. In the experimental materials used by the author, we found Thiophene-2-sulfonyl chloride(cas: 16629-19-9Reference of Thiophene-2-sulfonyl chloride)

Thiophene-2-sulfonyl chloride(cas: 16629-19-9) is a member of sulfonyl chlorides. Sulfonyl chlorides are reactive sulfonic acid derivatives similar in properties and reactivity to acid chlorides of carboxylates. The sulfonic acid group, however, is a highly hindered molecule, containing a tetrahedral configuration of substituents. Reference of Thiophene-2-sulfonyl chloride

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics