Category: chlorides-buliding-blocks

Wang, Yujia published the artcileChiral Atropisomeric Indenocorannulene Bowls: Critique of the Cahn-Ingold-Prelog Conception of Molecular Chirality, COA of Formula: C7H8BClO2, the publication is Angewandte Chemie, International Edition (2018), 57(22), 6470-6474, database is CAplus and MEDLINE.

Chiral corannulenes abound, but suffer generally from configurational lability associated with bowl-to-bowl inversion, thus obviating questions of stereogenicity and stereoelement construction. In contrast, peri-annulated corannulenes show greatly increased barriers for bowl-to-bowl inversion; specifically indenocorannulenes invert on a time scale too slow to observe by normal NMR methods and raise the possibility of creating chiral atropisomeric bowl-shaped aromatics Two methods for preparing indenocorannulene from simple 2-haloarylcorannulenes-silyl cation C-F activation, and Pd-mediated C-Cl activation^[5]-enable the synthesis of an array of such chiral atropisomeric indenocorannulenes. Resolution of the enantiomers by high-performance liquid chromatog. over chiral support phases motivates the study of chiroptical properties, the assignment of absolute “Cartesian” configuration, and the assessment of configurational stability. These studies bring into question any systematic assignment of nontrivial stereoelements (i.e. not the mol. in its entirety) and refute any assertion of congruence between “Cahn-Ingold-Prelog elements” and the phys. or “Cartesian” basis of chirality.

Angewandte Chemie, International Edition published new progress about 145349-62-8. 145349-62-8 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Boronic acid and ester,Benzene,Boronic Acids, name is 2-Chloro-4-methylphenylboronic acid, and the molecular formula is C11H14O2, COA of Formula: C7H8BClO2.

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

Lowen, Gregory T. published the artcileA Novel Synthesis of Phosphonates from Diethyl (Trichloromethyl)phosphonate, Application In Synthesis of 866-23-9, the publication is Journal of Organic Chemistry (1994), 59(16), 4548-50, database is CAplus.

Com. available di-Et (trichloromethyl)phosphonate was reacted with aldehydes and ketones to generate (chlorovinyl)phosphonates, e.g., PhCH:CClPO(OEt)₂, in a single step. These intermediates could be hydrogenated in high yields to the corresponding saturated phosphonates..

Journal of Organic Chemistry published new progress about 866-23-9. 866-23-9 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyltrichloromethylphosphonate, and the molecular formula is C5H10Cl3O3P, Application In Synthesis of 866-23-9.

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

Doetterl, Matthias published the artcileNickel-Catalyzed Propene Dimerization Reactions in Triphenylbismuth-Buffered Chloroaluminate Ionic Liquids: High Performance with Unconventional Cations, Category: chlorides-buliding-blocks, the publication is Advanced Synthesis & Catalysis (2012), 354(2-3), 399-407, database is CAplus.

The addition of triphenylbismuth (BiPh₃) efficiently buffers Lewis acidic chloroaluminate ionic liquids over a wide range of compositions Since the m.ps. of these ternary mixtures are lower compared to unbuffered chloroaluminate systems, the scope of cations for the formation of buffered room temperature ionic liquids is greatly extended. The buffered ionic liquids were used to activate nickel complexes for selective biphasic propene dimerization reactions. Lifetimes, selectivities and productivities of such dimerization catalysts could be adjusted by the choice of the cation and the composition At lower reaction temperatures, the selectivities to give dimers increased significantly. Propene dimers were obtained with selectivities of up to 98%. A cation screening with 100 ammonium and phosphonium halide salts was performed. N-Methylpyrrolidine hydrochloride gave the best results in terms of selectivity and lifetime. Propene dimerization reactions in BiPh₃-buffered chloroaluminate melts were catalyzed by various soluble nickel compounds with similar performances. The introduction of basic, sterically demanding tricyclohexylphosphine ligands led to higher degrees of branching, however, at the expense of lower dimer selectivities.

Advanced Synthesis & Catalysis 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, Category: chlorides-buliding-blocks.

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

Peters, Rene published the artcilePractical Formal Total Syntheses of the Homocamptothecin Derivative and Anticancer Agent Diflomotecan via Asymmetric Acetate Aldol Additions to Pyridine Ketone Substrates, Application of 2-Chloroisonicotinic acid, the publication is Journal of Organic Chemistry (2006), 71(20), 7583-7595, database is CAplus and MEDLINE.

Two practical, efficient, and scalable asym. routes to DE ring fragment I, a key building block in the synthesis of the homocamptothecin derivative diflomotecan (II), are described. The “acetal route” starts from 2-chloro-4-cyanopyridine and represents an enantioselective and optimized modification of the original racemic discovery chem. synthesis. The inefficient optical resolution procedure was replaced by an efficient asym. acetate aldol addition (dr 87:13) to a ketone substrate as the key step generating the (R)-configured quaternary stereocenter with high stereoselectivity. I was finally obtained in 8.9% overall yield (er 99.95:0.05) over nine steps, avoiding chromatog. purifications and comparing favorably with the initial procedure. In the related “amide route” starting from 2-chloroisonicotinic acid, a secondary amide directing group was used to facilitate the ortho lithiation of the pyridine 3-position. The key step of this protocol again consists of a practical asym. acetate aldol addition (dr = 87:13). The DE ring building block I was thus obtained in 11.1% overall yield (er > 99.95:0.05) over nine steps requiring only one chromatog. purification

Journal of Organic Chemistry published new progress about 6313-54-8. 6313-54-8 belongs to chlorides-buliding-blocks, auxiliary class Pyridine,Chloride,Carboxylic acid, name is 2-Chloroisonicotinic acid, and the molecular formula is C6H4ClNO2, Application of 2-Chloroisonicotinic acid.

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

Bedair, A. H. published the artcileBiologically active sulfonamides derived from α-pyrones, Formula: C9H5ClO4S, the publication is Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry (1987), 26B(1), 91-4, database is CAplus.

Amidation of 3-carbethoxycoumarin (I) and p-H₂NC₆H₄SO₂NHR [e.g., R = H, o-, m-, and p-tolyl, CH₂Ph, C(NH₂):NH] gave R¹CONHC₆H₄SO₂NHR-p (II) (same R; R¹ = coumarin-3-yl). Treatment of I with p-H₂NNHSO₂C₆H₄NHAc gave R¹CONHNHSO₂C₆H₄R² III (same R¹; R² = NHAc-p), which was converted to III (R² = N:CHPh-p) with PhCHO after hydrolysis. Substitution reaction of 6-coumarinsulfonyl chloride (= R³SO₂Cl) with p– or o-HOC₆H₄CHO gave R³SO₃C₆H₄CHO-p (IV) or –o, resp. IV was converted to Schiff bases V (R⁴ = o-NO₂, p-Me) with R⁴C₆H₄NH₂ (same R⁴). Similar reactions occurred starting with 3-carbethoxy-5,6-benzocoumarin. II (R = H, o-tolyl), IV, and V showed bactericidal activity.

Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry published new progress about 10543-42-7. 10543-42-7 belongs to chlorides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Chloride,Sulfonyl chlorides,Ester, name is Coumarin-6-sulfonyl chloride, and the molecular formula is C9H5ClO4S, Formula: C9H5ClO4S.

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

El-Maghraby, A. A. published the artcileSynthesis of coumarin sulfonamides, sulfonates, and related compounds, Related Products of chlorides-buliding-blocks, the publication is Egyptian Journal of Chemistry (1985), 27(4), 459-69, database is CAplus.

Condensation of coumarin-6-sulfonyl chloride I (R = SO₂Cl) with H₂NCH₂CH₂NH₂ gave sulfonamide I [R = SO₂NH(CH₂)₂NH₂], which reacted with aromatic amines to give the corresponding Schiff bases I [R = SO₂NH(CH₂)₂N:CHR¹ (R¹ = Ph, substituted Ph)]. Various coumarin-3,6-disulfonamides II [R = SO₂NHR¹ (R¹ = Ph, substituted Ph)], diarylsulfonates II [R = SO₃R¹ (R¹ = substituted Ph)], and coumarin-6-sulfonamides I [R = SO₂NHR¹ (R¹ = Bu, CH₂Ph, 2-furyl, piperidyl)] were prepared starting from coumarin-3,6-disulfonyl chloride (II, R = SO₂Cl).

Egyptian Journal of Chemistry published new progress about 10543-42-7. 10543-42-7 belongs to chlorides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Chloride,Sulfonyl chlorides,Ester, name is Coumarin-6-sulfonyl chloride, and the molecular formula is C9H5ClO4S, Related Products of chlorides-buliding-blocks.

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

Alepee, N. published the artcileMulti-laboratory evaluation of SkinEthic HCE test method for testing serious eye damage/eye irritation using solid chemicals and overall performance of the test method with regard to solid and liquid chemicals testing, Name: 3-Chloro-4-fluoronitrobenzene, the publication is Toxicology In Vitro (2016), 55-70, database is CAplus and MEDLINE.

A prospective multicentre study of the reconstructed human corneal epithelial tissue-based in vitro test method (SkinEthic HCE) was conducted to evaluate its usefulness to identify chems. as either not classified for serious eye damage/eye irritation (No Cat.) or as classified (Cat. 1/Cat. 2) within UN GHS. The aim of this study was to demonstrate the transferability and reproducibility of the SkinEthic HCE EITS protocol for solids and define its predictive capacity. Briefly, 60 chems. were three times tested (double blinded) in 3 laboratories and 35 addnl. chems. were tested three times in one laboratory Good within laboratory reproducibility was achieved of at least 95% (57/60) and 96.8% (92/95) for the extended data set. Furthermore, the overall concordance between the laboratories was 96.7% (58/60). The accuracy of the SkinEthic HCE EITS for the extended dataset, based on bootstrap resampling, was 81.0% (95% CI: 78.9% to 83.2%) with a sensitivity of 90.5% (95% CI: 88.1% to 92.9%) and specificity of 73.6% (95% CI: 71.7% to 75.5%). Overall, 200 chems. were tested (105 liquids (EITL protocol) and 95 solids (EITS protocol)) resulting in a sensitivity of 95.2%, specificity of 72.1% and accuracy of 83.7%, thereby meeting all acceptance criteria for predictive capacity.

Toxicology In Vitro 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, Name: 3-Chloro-4-fluoronitrobenzene.

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

Babii, Oleg published the artcileDirect Photocontrol of Peptidomimetics: An Alternative to Oxygen-Dependent Photodynamic Cancer Therapy, Computed Properties of 219537-97-0, the publication is Angewandte Chemie, International Edition (2016), 55(18), 5493-5496, database is CAplus and MEDLINE.

Conventional photodynamic treatment strategies are based on the principle of activating mol. oxygen in situ by light, mediated by a photosensitizer, which leads to the generation of reactive oxygen species and thereby causes cell death. A diarylethene-derived peptidomimetic is presented that is suitable for photodynamic cancer therapy without any involvement of oxygen. This light-sensitive mol. is not a mediator but is itself the cytotoxic agent. As a derivative of the cyclic amphiphilic peptide gramicidin S, the peptidomimetic exists in two thermally stable photoforms that are interconvertible by light of different wavelengths. The isomer generated by visible light shows much stronger toxicity against tumor cells than the UV-generated isomer. First in vivo applications are demonstrated on a tumor animal model to illustrate how the peptidomimetic can be administered in the less toxic form and then activated locally in a solid tumor by visible light.

Angewandte Chemie, International Edition 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, Computed Properties of 219537-97-0.

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

Pujala, Brahmam published the artcileDiscovery of Pyrazolopyrimidine Derivatives as Novel Dual Inhibitors of BTK and PI3Kδ, COA of Formula: C12H16BClO3, the publication is ACS Medicinal Chemistry Letters (2016), 7(12), 1161-1166, database is CAplus and MEDLINE.

The aberrant activation of B-cells has been implicated in several types of cancers and hematol. disorders. BTK and PI3Kδ are kinases responsible for B-cell signal transduction, and inhibitors of these enzymes have demonstrated clin. benefit in certain types of lymphoma. Simultaneous inhibition of these pathways could result in more robust responses or overcome resistance as observed in single agent use. The authors report a series of novel compounds that have low nanomolar potency against both BTK and PI3Kδ as well as acceptable PK properties that could be useful in the development of treatments against B-cell related diseases.

ACS Medicinal Chemistry Letters published new progress about 960388-56-1. 960388-56-1 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Boronic acid and ester,Benzene,Phenol,Boronate Esters,Boronic Acids,Boronic acid and ester,Boronate Esters, name is 3-Chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol, and the molecular formula is C12H16BClO3, COA of Formula: C12H16BClO3.

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

Singh, Sarita published the artcileSynthesis and evaluation of substituted 8,8-dimethyl-8H-pyrano[2,3-f]chromen-2-one derivatives as vasorelaxing agents, SDS of cas: 4584-49-0, the publication is Bioorganic & Medicinal Chemistry Letters (2020), 30(1), 126759, database is CAplus and MEDLINE.

A series of substituted 8,8-dimethyl-8H-pyrano[2,3-f]chromen-2-ones I [R = Me, (CH₂)₂NMe₂, CH₂C(O)N(Me)(n-Bu), etc.] was synthesized from scopoletin as vasorelaxing agents. The synthesized compounds were evaluated for vasorelaxation in endothelium intact rat main mesenteric artery (MMA). Scopoletin, and compounds I [R = Me, CH₂C(O)N(Me)(n-Bu), (CH₂)₄C(O)N(Me)(n-Bu), CH₂C(O)NH(n-pentyl), (CH₂)₃C(O)N(Me)(n-pentyl), (CH₂)₄C(O)NH(n-pentyl)] showed significant vasorelaxation in precontracted MMA within the range of EC₅₀ value 1.58-5.02μM. These derivatives presented 29.40-70.89 fold increased sensitivity for exptl. tissue compared to scopoletin, the parent mol. Among others, compound I [R = Me] was found to be the most active compound which had EC₅₀ 1.58μM with 70.89 fold increased sensitivity. The mechanistic evaluation of compound I [R = Me] showed that it exerted vasorelaxation through Ca²⁺-activated K⁺ (BKca) channel and the effect was endothelium-independent.

Bioorganic & Medicinal Chemistry Letters published new progress about 4584-49-0. 4584-49-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Salt,Amine,Aliphatic hydrocarbon chain, name is 2-Chloro-N,N-dimethylpropan-1-amine hydrochloride, and the molecular formula is C15H23BO2, SDS of cas: 4584-49-0.

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