An Electrophilic Trifluoromethylthiolation of Silylenol Ethers and <i>β</i>
-Naphthols with Diethylaminosulfur Trifluoride and (Trifluoromethyl)trimethylsilane
作者:Perumal Saravanan、Pazhamalai Anbarasan
DOI:10.1002/adsc.201800366
日期:2018.8.6
efficient and general trifluoromethylthiolation of silylenol ethers and β‐naphthols have been accomplished employing the combination of diethylaminosulfur trifluoride (DAST) and (trifluoromethyl)trimethylsilane (CF3TMS) as source of electrophilic trifluoromethylthio moiety for the synthesis of α‐trifluoromethylthiolated carbonyl compounds and β‐naphthols in good yields. Important features of this method
[EN] GLYCOCLUSTERS AND THEIR PHARMACEUTICAL USE AS ANTIBACTERIALS<br/>[FR] GLYCOCLUSTERS ET LEUR UTILISATION PHARMACEUTIQUE COMME ANTIBACTÉRIENS
申请人:CENTRE NAT RECH SCIENT
公开号:WO2015040209A1
公开(公告)日:2015-03-26
A molecule responding to formula (I)of the glycocluster type with galactose residues at their extremities. Simple and efficient methods for the preparation of these compounds. Medical use of compounds (I) as inhibitors of infections by Pseudomonas aeruginosa, more specifically as inhibitors of Pseudomonas aeruginosa's virulence.
Development of <i>Pseudomonas aeruginosa</i>
Lectin LecA Inhibitor by using Bivalent Galactosides Supported on Polyproline Peptide Scaffolds
作者:Shao-Feng Huang、Cin-Hao Lin、Yu-Tsung Lai、Chia-Lung Tsai、Ting-Jen R. Cheng、Sheng-Kai Wang
DOI:10.1002/asia.201701724
日期:2018.3.16
polyproline peptides to create a scaffold that controls the galactoside positions to fit their binding sites on LecA. With a modular scaffold design, both the galactoside ligands and the inter‐ligand distance can be altered conveniently. We prepared scaffolds with spacings of 9, 18, 27, and 36 Å for ligand conjugation and found that glycopeptides with galactosides ligands three helical turns (27 Å) apart
efficient cascade reaction of 2-(1-alkynyl)-2-alken-1-ones with 2-naphthols promoted by silver trifluoroacetate is disclosed, providing an expeditious access to 1,2-dihydronaphtho[2,1-b]furans with moderate to good yields. This domino process involves highly regio- and diastereoselective sequential cyclization/nucleophilic addition/oxidative ring opening/oxa-Michael addition reactions to construct three
公开了由三氟乙酸银促进的2-(1-炔基)-2-链烯-1-酮与2-萘的有效级联反应,提供了快速接触1,2-二氢萘并[2,1- b ]呋喃的途径。中等至良好的产量。该多米诺过程涉及高度区域和非对映选择性的连续环化/亲核加成/氧化性开环/ oxa-Michael加成反应,以构建三个新的化学键和一个新的五元环。还提出了克级实验和开发不对称变体的初步结果,以显示当前反应的实用性和潜力。
Atroposelective Synthesis of Axially Chiral C2-Arylindoles via Rhodium-Catalyzed Asymmetric C–H Bond Insertion
作者:Junheng Liu、Qiongya Li、Ying Shao、Jiangtao Sun
DOI:10.1021/acs.orglett.2c01818
日期:2022.7.1
A highly efficient rhodium-catalyzed formal C–Hinsertion reaction between indoles and 1-diazonaphthoquinones has been established, providing a novel protocol for the atroposelective synthesis of axiallychiral C2-arylindoles (up to 99:1 er) under mild reaction conditions. Typically, only 1 mol % of Rh2(S-PTTL)4 is used and the chelation group is not needed for this conversion.