Author: Jessica.F

Guin, Avishek published the artcileTransition-Metal-Free C2-Functionalization of Pyridines through Aryne Three-Component Coupling, Product Details of C8H4ClF3O, the publication is Chemistry – A European Journal (2021), 27(55), 13864-13869, database is CAplus and MEDLINE.

The direct C2-functionalization of pyridines I (R = H, Me, Cl, pyrrolidin-1-yl, etc.) through a transition-metal-free protocol by using arynes 2-Si(CH₃)₃-3-R¹-4-R²-5-R³-6-R⁴C₆OS(O)₂CF₃ (R¹ = H, Me, OMe; R² = H, Me, F, Cl; R¹R² = -(CH₂)₄-, -CH=CH-CH=CH-; R³ = H, Me, F; R²R³ = -OCH₂O-, -(CH₂)₂-, -CH=CH-CH=CH-; R⁴ = H, Me) multicomponent coupling is demonstrated. The reaction allowed a broad-scope synthesis of C2-substituted pyridine derivatives bearing the -CF₃ group II in good yields with α,α,α-trifluoroacetophenones ArC(O)CF₃ (Ar = Ph, pyren-1-yl, 1-benzothiophen-3-yl, etc.) as the third component. Activated keto esters could also be employed as the third component in this formal 1,2-di(hetero)arylation of ketones. Performing the reaction under dilute conditions inhibited the competing pyridine-aryne polymerization pathway. Nucleophilic attack by the initially generated pyridylidene intermediate on the carbonyl followed by an S_NAr process resembling the Smiles rearrangement affords the desired products.

Chemistry – A European Journal published new progress about 5860-95-7. 5860-95-7 belongs to chlorides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Chloride,Benzene,Ketone, name is 1-(2-Chlorophenyl)-2,2,2-trifluoroethanone, and the molecular formula is C8H4ClF3O, Product Details of C8H4ClF3O.

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

Rozema, Michael J. published the artcileDevelopment of a Scalable Enantioselective Synthesis of JAK Inhibitor Upadacitinib, Safety of trimethyloxosulphonium chloride, the publication is Organic Process Research & Development (2022), 26(3), 949-962, database is CAplus.

Process development of a six-stage synthesis of upadacitinib, a JAK1 inhibitor, was described. It was highlighted by an enantioselective and diastereoselective hydrogenation of a tetrasubstituted olefin to set the two pyrrolidine stereocenters. Preparation of the main fragments and strategies to link them together, optimization of the imidazole cyclization and in-depth understanding of the formation of the urea moiety at the final stage were discussed.

Organic Process Research & Development published new progress about 5034-06-0. 5034-06-0 belongs to chlorides-buliding-blocks, auxiliary class Salt,Aliphatic hydrocarbon chain, name is trimethyloxosulphonium chloride, and the molecular formula is C3H9ClOS, Safety of trimethyloxosulphonium chloride.

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

McDermott, Todd S. published the artcileDevelopment of a Scalable Synthesis of Dipeptidyl Peptidase-4 Inhibitor ABT-279, Computed Properties of 6313-54-8, the publication is Organic Process Research & Development (2009), 13(6), 1145-1155, database is CAplus.

A convergent, scalable synthesis of dipeptidyl peptidase-4 inhibitor, ABT-279 (I), was developed and demonstrated on multikilogram scale. The cis-2,5-disubstituted pyrrolidine was generated by cyclization of a Boc-amine onto an alkynyl ketone followed by stereospecific reduction of the resulting acyliminium intermediate. The amine coupling partner was prepared by a novel Hofmann rearrangement promoted by 1,3-dibromo-5,5-dimethylhydantoin. The final product was isolated as the L-malic acid salt. The scale-up campaign consisted of 15 steps and delivered 42 kg of ABT-279 in 14% overall yield. A second-generation synthesis that addresses some of the issues encountered during scale-up was developed and demonstrated on kilogram scale.

Organic Process Research & Development 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, Computed Properties of 6313-54-8.

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

Gleave, Robert J. published the artcileSynthesis and evaluation of 3-amino-6-aryl-pyridazines as selective CB₂ agonists for the treatment of inflammatory pain, Name: 2-Chloro-4-methylphenylboronic acid, the publication is Bioorganic & Medicinal Chemistry Letters (2010), 20(2), 465-468, database is CAplus and MEDLINE.

A series of 3-amino-6-aryl-pyridazines have been identified as CB₂ agonists with high efficacy and selectivity against the CB₁ receptor. Details of the investigation of structure-activity relationships (SAR) are disclosed, which led to the identification of pyridazine analog I, a compound with high potency in an in vivo model of inflammatory pain.

Bioorganic & Medicinal Chemistry Letters 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 C7H8BClO2, Name: 2-Chloro-4-methylphenylboronic acid.

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

Bakhtin, Stanislav published the artcileCatalytic activity of tertiary amines with antisymbatic change of basic and nucleophilic properties in the chloroxypropylation reaction of acetic acid, Quality Control of 23616-79-7, the publication is Reaction Kinetics, Mechanisms and Catalysis (2016), 119(1), 139-148, database is CAplus.

The kinetic dependence of the reaction of (chloromethyl)oxirane ring-opening by acetic acid in the presence of tertiary amines R₃N and R_nNMe₃–_n has been studied. The orders of reaction with respect to acid and catalyst have been determined The nucleophilicity of amines used has been measured in the quaternization reaction of R₃N and R_nNMe₃–_n by benzyl chloride (Menshutkin reaction). On the basis of correlations “amines structure-catalytic activity”, it has been shown that amines act as nucleophiles in this reaction.

Reaction Kinetics, Mechanisms and 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, Quality Control of 23616-79-7.

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

Filonenko, L. P. published the artcileSilylation of compounds containing trichloromethyl groups, SDS of cas: 866-23-9, the publication is Zhurnal Obshchei Khimii (1987), 57(10), 2320-4, database is CAplus.

Compounds containing the Cl₃C group are silylated under mild conditions by the binary system P(NMe₂)₃/ClSiMe₃. Thus, silylation of (Cl₃C)₂CO gave 50% Cl₂C:C(CCl₃)OSiMe₃.

Zhurnal Obshchei Khimii 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, SDS of cas: 866-23-9.

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

Awwad, Fatima published the artcileAuxin protects Arabidopsis thaliana cell suspension cultures from programmed cell death induced by the cellulose biosynthesis inhibitors thaxtomin A and isoxaben, Product Details of C8H7ClO3, the publication is BMC Plant Biology (2019), 19(1), 512, database is CAplus and MEDLINE.

Thaxtomin A (TA) is a natural cellulose biosynthesis inhibitor (CBI) synthesized by the potato common scab-causing pathogen Streptomyces scabies. Inhibition of cellulose synthesis by TA compromises cell wall organization and integrity, leading to the induction of an atypical program of cell death (PCD). These processes may facilitate S. scabies entry into plant tissues. To study the mechanisms that regulate the induction of cell deathin response to inhibition of cellulose synthesis, we usedArabidopsis thalianacell suspension cultures treated withtwo structurally different CBIs, TA and the herbicide isoxaben (IXB). The induction of cell death by TA and IXB was abrogated following pretreatment with the synthetic auxin2,4-dichlorophenoxyacetic acid (2,4-D) and the natural auxin indole-3-acetic acid (IAA). The addition of auxin efflux inhibitors also inhibited the CBI-mediated induction of PCD. This effect may be due to intracellular accumulation of auxin. Auxin has a wide range of effects in plant cells, including a role in the control of cell wall composition and rigidity to facilitate cell elongation. Using Atomic Force Microscopy (AFM)-based force spectroscopy, we found that inhibition of cellulose synthesis by TA and IXB in suspension-cultured cells decreased cell wall stiffness to a level slightly different than that caused by auxin. However, the cell wall stiffness in cells pretreated with auxin prior to CBI treatment was equivalent to that of cells treated with auxin only. Addition of auxin to Arabidopsis cell suspension cultures prevented the TA- and IXB-mediated induction of cell death. Cell survival was also stimulated by inhibition of polar auxin transport during CBI-treatment. Inhibition of cellulose synthesis perturbed cell wall mech. properties of Arabidopsis cells. Auxin treatment alone or with CBI also decreased cell wall stiffness, showing that the mech. properties of the cell wall perturbed by CBIs were not restored by auxin. However, since auxin’s effects on the cell wall stiffness apparently overrode those induced by CBIs, we suggest that auxin may limit the impact of CBIs by restoring its own transport and/or by stabilizing the plasma membrane – cell wall – cytoskeleton continuum.

BMC Plant Biology 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 C8H7ClO3, Product Details of C8H7ClO3.

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

Zanella, Yannick published the artcileNew route to 1-formylalkylphosphonates using diethyl trichloromethylphosphonate as a precursor, Name: Diethyltrichloromethylphosphonate, the publication is Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1995), 2835-8, database is CAplus.

(EtO)₂P(O)CCl₃ and Me₃SiCl were converted by a three-step sequence beginning with BuLi into α-phosphorylated α-silylated α-substituted carbanions, (EtO)₂P(O)CRLiSiMe₃ [I; R = Pr, C₅H₁₁, C₇H₁₅, C₁₂H₂₅, CH:CH₂, crotyl, ClCH₂(CH₂)_n, n = 2,3]. I reacts with Et formate in the presence of Me₃SiCl to give transient silylated acetals, (EtO)₂P(O)CR(SiMe₃)CH(OEt)(OTMS), which readily undergo acid hydrolysis to afford 1-formylalkylphosphonates, (EtO)₂P(O)CHRCHO, in good yield.

Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-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 C11H22N2O4, Name: Diethyltrichloromethylphosphonate.

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

Satyamurthy, Nagichettiar published the artcileSynthesis and stereochemistry of 1-oxa-6-heteraspiro[2.5]octanes. Single-crystal analysis of 6-phenyl-1-oxa-6-phosphaspiro[2.5]octane 6-sulfide, Recommanded Product: trimethyloxosulphonium chloride, the publication is Phosphorus and Sulfur and the Related Elements (1984), 19(1), 113-29, database is CAplus.

The synthesis of several title spiro compounds is reported. Stereochem. anal. via NMR studies and single-crystal x-ray diffraction of 6-phenyl-1-oxa-6-phosphaspiro[2.5]octane 6-sulfide provide the basis for correlations of structures for other members of the families yet unknown. The phosphorinane ring assumes a slightly flattened chair conformation with the Ph-P bond equatorial and the P:S bond axial. The plane of the epoxide is virtually coincident with a pseudo-mirror plane through P(6), C(3), C(9) and S(15). The Ph group is rotated out of this plane by 28.2°. Although the P-ring C distances are 1.813(3) and 1.819(3) Å, resp., and appear about normal, the P-Ph bond of 1.813(3) Å is longer than that in a few model systems. The C(3)-O(1) bond in the epoxide is axial, or rather pseudo-axial. Ring deformations are consistent with a few model epoxides. Epoxidation of cis-2,6-diphenyl-4-thianone with Me₂S(O):CH₂ in DMSO led, surprisingly, to a tertiary alc., presumably via ring cleavage of the expected intermediate epoxide.

Phosphorus and Sulfur and the Related Elements published new progress about 5034-06-0. 5034-06-0 belongs to chlorides-buliding-blocks, auxiliary class Salt,Aliphatic hydrocarbon chain, name is trimethyloxosulphonium chloride, and the molecular formula is C3H9ClOS, Recommanded Product: trimethyloxosulphonium chloride.

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

Joung, Seewon published the artcileNi-catalyzed 1,2-benzylboration of 1,2-disubstituted unactivated alkenes, Recommanded Product: 1-(Chloromethyl)-4-(trifluoromethyl)benzene, the publication is Chemical Science (2019), 10(47), 10944-10947, database is CAplus and MEDLINE.

Nickel-catalyzed 1,2-carboboration of alkenes is emerging as a useful method for chem. synthesis. Prior studies have been limited to only the incorporation of aryl groups. In this manuscript, a method for the 1,2-benzylboration of unactivated alkenes is presented. The reaction combines readily available alkenes, diboron reagents and benzylchlorides to generate synthetically versatile products with control of stereochem. The utility of the products as well as the mechanistic details of the process are also presented.

Chemical Science published new progress about 939-99-1. 939-99-1 belongs to chlorides-buliding-blocks, auxiliary class Fluoride,Chloride,Benzyl chloride,Benzene, name is 1-(Chloromethyl)-4-(trifluoromethyl)benzene, and the molecular formula is C8H6ClF3, Recommanded Product: 1-(Chloromethyl)-4-(trifluoromethyl)benzene.

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