Highly efficient asymmetric construction of novel indolines and tetrahydroquinoline derivatives <i>via</i> aza-Barbier/C–N coupling reaction
作者:Tao Guo、Bin-Hua Yuan、Wen-Jie Liu
DOI:10.1039/c7ob02891a
日期:——
Highly stereoselectivesyntheses of chiral indolines and tetrahydroquinolines are achieved by combining the asymmetric Zn-mediated allylation of chiral N-tert-butanesulfinyl imines with efficient intramolecular C–N cross-coupling. Herein, the advantages of such a synthetic strategy are illustrated by the synthesis of indolines and tetrahydroquinolines with quaternary stereocenters and multi-substituted
The iridium-catalyzed asymmetric hydrogenation of 2-aryl allyl phthalimides to afford enantioenriched β-aryl-β-methyl amines is presented. Recently developed Ir-MaxPHOX catalysts are used for this enantioselective transformation. The mild reaction conditions and the feasible removal of the phthalimido group makes this catalytic method easily scalable and of great interest to afford chiral amines. The
Consecutive borylcupration/C–C coupling of γ-alkenyl aldehydes towards diastereoselective 2-(borylmethyl)cycloalkanols
作者:Ricardo J. Maza、Jordi Royes、Jorge J. Carbó、Elena Fernández
DOI:10.1039/d0cc02263b
日期:——
Copper(I) catalyzes the borylativecyclization of γ-alkenyl aldehydes through chemo- and regioselective addition of Cu–B to CC and concomitant intramolecular 1,2-addition of Cu–C on CO. The products are formed in an exclusive diastereoselective manner and computational analysis identifies the key points for the observed chemo- and diastereoselectivity.
Difluorination of α-(bromomethyl)styrenes <i>via</i> I(I)/I(III) catalysis: facile access to electrophilic linchpins for drug discovery
作者:Joel Häfliger、Keith Livingstone、Constantin G. Daniliuc、Ryan Gilmour
DOI:10.1039/d1sc01132d
日期:——
Simple α-(bromomethyl)styrenes can be processed to a variety of 1,1-difluorinated electrophilic building blocks via I(I)/I(III) catalysis.
简单的α-(溴甲基)苯乙烯可以通过I(I)/I(III)催化转化为各种1,1-二氟电泳性构建模块。
Diverse Synthesis of Alkenylsilanes via Pd-Catalyzed Alkenyl C–H Silylation
作者:Zi-Hang Ye、Fei-Hu Gou、Yichen Wu、Chuan-Ying Li、Peng Wang
DOI:10.1021/acs.orglett.3c00633
日期:2023.3.31
Here, we disclose a generalapproach for the diverse synthesis of alkenylsilanes in a highly efficient, stereoselective, and atom-economic manner by leveraging the palladium-catalyzed disilylation reaction of 2-bromostyrene derivatives with hexamethyldisilane, which is suitable for the preparation of a series of disubstituted, trisubstituted, and tetrasubstituted alkenylsilanes. Furthermore, the resulting