through asymmetric reduction of ketones or kineticresolution of secondaryalcohols, enantioselective synthesis of the corresponding secondaryalcohols is challenging when the two groups attached to the prochiral or chiral centers are spatially or electronically similar. For examples, dialkyl (sp3 vs. sp3), diaryl (sp2 vs. sp2), and aryl-alkenyl (sp2 vs. sp2) alcohols are difficult to produce with high enantioselectivities
Highly diastereo- and enantio-selective epoxidation of secondary allylic alcohols catalyzed by styrene monooxygenase
作者:Hui Lin、Yan Liu、Zhong-Liu Wu
DOI:10.1039/c0cc04360e
日期:——
Enantiomerically enriched glycidol derivatives with contiguous stereogenic centers were obtained in a highly diastereo- and enantio-selective epoxidation catalyzed with the styrene monooxygenase StyAB2.
Anti‐Markovnikov Hydroamination of Racemic Allylic Alcohols to Access Chiral γ‐Amino Alcohols
作者:Ruirui Xu、Kun Wang、Haoying Liu、Weijun Tang、Huaming Sun、Dong Xue、Jianliang Xiao、Chao Wang
DOI:10.1002/anie.202009754
日期:2020.12
ruthenium‐catalyzed formal anti‐Markovnikov hydroamination of allylicalcohols for the synthesis of chiral γ‐amino alcohols is presented. Proceeding via an asymmetric hydrogen‐borrowing process, the catalysis allows racemic secondary allylicalcohols to react with various amines, affording enantiomerically enriched chiral γ‐amino alcohols with broad substrate scope and excellent enantioselectivities (68 examples
The direct chemoselective carbonylative cross-coupling reaction of allylic alcohols and organoalanes with 1 atm CO via nickel catalysis has been developed to access the β,γ-unsaturated ketones with broad scope. The use of organoalanes as both the coupling components and the activators for the alcohol functionalization was found to be both crucial and advantageous as the method does not require any
已经开发了通过镍催化烯丙醇和有机烷烃与 1 atm CO 的直接化学选择性羰基化交叉偶联反应来获得具有广泛范围的 β,γ-不饱和酮。由于该方法不需要任何外部活化剂,因此发现使用有机丙烷作为偶联组分和醇官能化的活化剂既是关键又是有利的。
Photoredox/Nickel Dual-Catalyzed Regioselective Allylic Arylations of Allyl Trifluoroborates with Aryl Halides
作者:Peizhuo Lv、Ali Wang、Xin Xie、Yulong Chen、Yuanhong Liu
DOI:10.1021/acs.orglett.3c01147
日期:2023.5.12
An efficient photoredox/nickel dual-catalyzed coupling of allyl trifluoroborates with aryl halides has been developed, which provides an attractive route to diverse-substituted allylic benzenes. The method offers several advantages, such as high efficiency and regioselectivity, mild reaction conditions, wide substrate scope, and functional group compatibility. Mechanistic studies suggest that a π-allyl