Author: Jessica.F

Guo, Rui-Ting published the artcileRhodium-Catalyzed ortho-Selective Carbene C-H Insertion of Unprotected Phenols Directed by a Transient Oxonium Ylide Intermediate, Computed Properties of 23616-79-7, the publication is Organic Letters (2020), 22(3), 908-913, database is CAplus and MEDLINE.

Ortho-Selective carbene C-H insertion of unprotected phenols is achieved with di-Me diazomalonate under the catalysis of [Rh(COD)Cl]₂. After the C-H insertion, subsequent cyclization and electrophilic addition of another carbene mol. affords tris-carboxylate-substituted 2-benzofuranones as the final reaction products. The enantioselective variant has been developed with the use of chiral diene ligands. Mechanistic experiments indicate that a transient oxonium ylide directing group might be responsible for the regiocontrol at the C-H activation step.

Organic Letters published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Computed Properties of 23616-79-7.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Sun, Weimei published the artcileTargeting enteropeptidase with reversible covalent inhibitors to achieve metabolic benefits, Recommanded Product: 3-Chloro-4-hydroxyphenylacetic acid, the publication is Journal of Pharmacology and Experimental Therapeutics (2020), 375(3), 510-521, database is CAplus and MEDLINE.

Inhibition of the serine protease enteropeptidase (EP) opens a new avenue to the discovery of chemotherapeutics for the treatment of metabolic diseases. Camostat has been used clin. for treating chronic pancreatitis in Japan; however, the mechanistic basis of the observed clin. efficacy has not been fully elucidated. We demonstrate that camostat is a potent reversible covalent inhibitor of EP, with an inhibition potency (kinact/KI) of 1.5 x 104 M-1s-1. High-resolution liquid chromatog.-mass spectrometry (LC-MS) showed addition of 161.6 Da to EP after the reaction with camostat, consistent with insertion of the carboxyphenylguanidine moiety of camostat. Covalent inhibition of EP by camostat is reversible, with an enzyme reactivation half-life of 14.3 h. Formation of a covalent adduct was further supported by a crystal structure resolved to 2.19 Å, showing modification of the catalytic serine of EP by a close analog of camostat, leading to formation of the carboxyphenylguanidine acyl enzyme identical to that expected for the reaction with camostat. Of particular note, minor structural modifications of camostat led to changes in the mechanism of inhibition. We observed from other studies that sustained inhibition of EP is required to effect a reduction in cumulative food intake and body weight, with concomitant improved blood glucose levels in obese and diabetic leptin-deficient mice. Thus, the structure-activity relationship needs to be driven by not only the inhibition potency but also the mechanistic and kinetic characterization. Our findings support EP as a target for the treatment of metabolic diseases and demonstrate that reversible covalent EP inhibitors show clin. relevant efficacy.

Journal of Pharmacology and Experimental Therapeutics published new progress about 33697-81-3. 33697-81-3 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Carboxylic acid,Benzene,Phenol, name is 3-Chloro-4-hydroxyphenylacetic acid, and the molecular formula is C12H10F2Si, Recommanded Product: 3-Chloro-4-hydroxyphenylacetic acid.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Chen, Jianyang published the artcileFacile one-pot synthesis of diarylacetylenes from arylaldehydes via an addition-double elimination process, Safety of 3-Chlorobenzylchloride, the publication is Organic & Biomolecular Chemistry (2021), 19(21), 4701-4705, database is CAplus and MEDLINE.

A practical one-pot protocol has been developed to synthesize diarylacetylenes ArCCAr¹ (Ar = Ph, naphthalen-1-yl, furan-2-yl, etc.; Ar¹ = Ph, 4-chlorophenyl, naphthalen-2-yl, etc.) from arylaldehydes ArCHO by treatment with 1-(arylmethyl)benzotriazoles I and LiN(SiMe₃)₂. The reaction proceeded through imine formation, Mannich-type addition and double elimination to deliver products in up to 99% yields with broad substrate scope. In addition, gram-scale synthesis of diarylacetylene (Ar = 4-bromophenyl, Ar¹ = Ph) has been demonstrated.

Organic & Biomolecular Chemistry published new progress about 620-20-2. 620-20-2 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 3-Chlorobenzylchloride, and the molecular formula is C7H6Cl2, Safety of 3-Chlorobenzylchloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Yang, Ke published the artcileDNA photocleavage and binding modes of methylene violet 3RAX and its derivatives: Effect of functional groups, Application In Synthesis of 4569-86-2, the publication is Australian Journal of Chemistry (2017), 70(7), 830-836, database is CAplus.

With 4′-amino-N,N-diethylaniline and aniline as starting materials, methylene violet 3RAX 1 and its derivatives 2-5 were synthesized. The 5 compounds were characterized by IR, UV-visible, and ¹H NMR spectroscopy and mass spectrometry. The binding mode between the synthesized compounds and DNA were investigated. The results showed that both compounds 1 and 5 bound to DNA by an intercalative mode, while compounds 2-4 interacted with DNA through a mixed binding mode involving groove binding and electrostatic interactions. The photocleavage ability of the 5 compounds to DNA were calculated to be 38, 40, 30, 20, and 13%, resp., when their concentration was adjusted to 400 μM. The singlet oxygen production of compounds measured by the 1,3-diphenylisobenzofuran method was consistent with the trend of DNA photocleavage ability. The DNA studies suggested that the binding mode between methylene violet 3RAX and DNA, the ability of methylene violet 3RAX to generate singlet oxygen, and the DNA photocleavage activity could be adjusted through modification of the amino group on methylene violet 3RAX.

Australian Journal of Chemistry published new progress about 4569-86-2. 4569-86-2 belongs to chlorides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Benzene, name is 3-Amino-7-(diethylamino)-5-phenylphenazin-5-ium chloride, and the molecular formula is C9H5FO2, Application In Synthesis of 4569-86-2.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Jin, Ling published the artcileAdditives structure in electroreduction of oxalic acid, Application of N-Benzyl-N,N-dibutylbutan-1-aminium chloride, the publication is Huagong Xuebao (Chinese Edition) (2010), 61(S1), 86-90, database is CAplus.

In this paper, as the background of the preparation of glyoxylic acid by the electroreduction of oxalic acid on lead electrodes, the effects of additives structure on electrode reaction have been studied. The results show that the cation of the additives has the most influence on current efficiency and the reaction selectivity. Furthermore, cation radicle is more sym. or the longest alkyl chain is shorter, the current efficiency and the reaction selectivity are higher. The tetra-Et quaternary ammonium salt has the best active effect.

Huagong Xuebao (Chinese Edition) published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Application of N-Benzyl-N,N-dibutylbutan-1-aminium chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Zhang, Ming-Lu published the artcileSwitchable, Reagent-Controlled C(sp³)-H Selective Iodination and Acetoxylation of 8-Methylquinolines, Computed Properties of 209919-30-2, the publication is Journal of Organic Chemistry (2022), 87(9), 5730-5743, database is CAplus and MEDLINE.

An efficient Pd-catalyzed C(sp³)-H selective iodination of 8-methylquinolines I (R = H, Ph, 4-chlorophenyl; R¹ = H, Cl, Ph, etc.; R² = H, F, Cl, Br; R³ = H, Cl, Br, I) is reported herein for the first time. Because of the versatility of organic iodides, the method offers a facile access to various C8-substituted quinolines II. By slightly switching the reaction conditions, an efficient C(sp³)-H acetoxylation of 8-methylquinolines I has also been enabled. Both approaches feature mild reaction conditions, good tolerance of functional groups, and a broad substrate scope.

Journal of Organic Chemistry published new progress about 209919-30-2. 209919-30-2 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Boronic acid and ester,Benzene,Boronic Acids,Boronic acid and ester, name is 4-Chloro-2-methylphenylboronic acid, and the molecular formula is C7H6N2O2S, Computed Properties of 209919-30-2.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Morano, Cain published the artcileMultiple Isotopic Labels for Quantitative Mass Spectrometry, Safety of 3-Carboxy-N,N,N-trimethylpropan-1-aminium chloride, the publication is Analytical Chemistry (Washington, DC, United States) (2008), 80(23), 9298-9309, database is CAplus and MEDLINE.

Quant. mass spectrometry is often performed using isotopically labeled samples. Although the 4-trimethylammonium butyryl (TMAB) labels have many advantages over other isotopic tags, only two forms have previously been synthesized (i.e., a heavy form containing nine deuteriums and a light form without deuterium). In the present report, two addnl. forms containing three and six deuteriums have been synthesized and tested. These addnl. isotopic tags perform identically to the previously reported tags; peptides labeled with the new TMAB reagents coelute from reversed-phase HPLC columns with peptides labeled with the lighter and heavier TMAB reagents. Altogether, these four tags allow for multivariate anal. in a single liquid chromatog./mass spectrometry anal., with each isotopically tagged peptide differing in mass by 3 Da per tag incorporated. The synthetic scheme is described in simple terms so that a biochemist without specific training in organic chem. can perform the synthesis. The interpretation of tandem mass spectrometry data for the TMAB-labeled peptides is also described in more detail. The addnl. TMAB isotopic reagents described here, together with the addnl. description of the synthesis and anal., should allow these labels to be more widely used for proteomics and peptidomics analyses.

Analytical Chemistry (Washington, DC, United States) published new progress about 6249-56-5. 6249-56-5 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst,Inhibitor,Natural product, name is 3-Carboxy-N,N,N-trimethylpropan-1-aminium chloride, and the molecular formula is C7H16ClNO2, Safety of 3-Carboxy-N,N,N-trimethylpropan-1-aminium chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Hou, Lili published the artcileReversible Photochemical Control of Singlet Oxygen Generation Using Diarylethene Photochromic Switches, Safety of 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, the publication is Journal of the American Chemical Society (2014), 136(3), 910-913, database is CAplus and MEDLINE.

Reversible noninvasive control over the generation of singlet oxygen is demonstrated in a bicomponent system comprising a diarylethene photochromic switch and a porphyrin photosensitizer by selective irradiation at distinct wavelengths. The efficient generation of singlet oxygen by the photosensitizer is observed when the diarylethene unit is in the colorless open form. Singlet oxygen generation is not observed when the diarylethene is converted to the closed form. Irradiation of the closed form with visible light (>470 nm) leads to full recovery of the singlet oxygen generating ability of the porphyrin sensitizer.

Journal of the American Chemical Society published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C15H14Cl2S2, Safety of 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Li, Dingzhong published the artcileFeO(OH)@C-Catalyzed Selective Hydrazine Substitution of p-Nitro-Aryl Fluorides and their Application for the Synthesis of Phthalazinones, COA of Formula: C6H3ClFNO2, the publication is ChemistryOpen (2022), 11(5), e202200023, database is CAplus and MEDLINE.

An efficient hydrazine substitution of p-nitro-aryl fluorides viz., 2-chloro-1-fluoro-4-nitrobenzene, 2-bromo-1-fluoro-4-nitrobenzene, 2-fluoro-5-nitroaniline, etc. with hydrazine hydrates catalyzed by FeO(OH)@C nanoparticles is described. These hydrazine substitutions of p-nitro-aryl fluorides bearing electron-withdrawing groups such as 2-chloro-1-fluoro-4-nitrobenzene, 2-bromo-1-fluoro-4-nitrobenzene, 1-bromo-2,4-difluoro-5-nitrobenzene, etc. proceeded efficiently with high yield and selectivity. Similarly, hydrogenations of p-nitro-aryl fluorides containing electron-donating groups such as 2-fluoro-5-nitroaniline, 1-fluoro-2-methyl-4-nitrobenzene, 2-bromo-4-fluoro-1-nitrobenzene, etc. also smoothly proceeded under mild conditions. Furthermore, with these prepared aryl hydrazines viz., (2-chloro-4-nitrophenyl)hydrazine, (3-fluoro-4-nitrophenyl)hydrazine, (2-bromo-4-nitrophenyl)hydrazine, (2,3-difluoro-4-nitrophenyl)hydrazine, (2-chloro-3-fluoro-4-nitrophenyl)hydrazine, some phthalazinones I (R = H, 4-hydroxyphenyl; R¹ = 2-Cl, 2-Br, 3-F, 2-Cl-3-F, 2,3-F₂), interesting as potential structures for pharmaceuticals, have been successfully synthesized in high yields.

ChemistryOpen published new progress about 350-30-1. 350-30-1 belongs to chlorides-buliding-blocks, auxiliary class Fluoride,Chloride,Nitro Compound,Benzene, name is 3-Chloro-4-fluoronitrobenzene, and the molecular formula is C6H3ClFNO2, COA of Formula: C6H3ClFNO2.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Sun, Guo-Quan published the artcileNickel-catalyzed electrochemical carboxylation of unactivated aryl and alkyl halides with CO₂, Application In Synthesis of 637-07-0, the publication is Nature Communications (2021), 12(1), 7086, database is CAplus and MEDLINE.

A general and practical electro-reductive Ni-catalytic system, realizing the electrocatalytic carboxylation of unactivated aryl chlorides and alkyl bromides with CO₂ were reported. A variety of unactivated aryl bromides, iodides and sulfonates can also undergo such a reaction smoothly. Notably, realized the catalytic electrochem. carboxylation of aryl (pseudo)halides with CO₂ avoiding the use of sacrificial electrodes. Moreover, this sustainable and economic strategy with electron as the clean reductant features mild conditions, inexpensive catalyst, safe and cheap electrodes, good functional group tolerance and broad substrate scope. Mechanistic investigations indicated that the reaction might proceed via oxidative addition of aryl halides to Ni(0) complex, the reduction of aryl-Ni(II) adduct to the Ni(I) species and following carboxylation with CO₂.

Nature Communications published new progress about 637-07-0. 637-07-0 belongs to chlorides-buliding-blocks, auxiliary class Inhibitor,Cell Cycle,PPAR, name is Ethyl 2-(4-chlorophenoxy)-2-methylpropanoate, and the molecular formula is C40H35N7O8, Application In Synthesis of 637-07-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics