Nickel-Catalyzed Umpolung Arylation of Ambiphilic α-Bromoalkyl Boronic Esters
作者:Shang-Zheng Sun、Ruben Martin
DOI:10.1002/anie.201712428
日期:2018.3.26
A nickel‐catalyzed reductive arylation of ambiphilic α‐bromoalkyl boronic esters with aryl halides is described. This platform provides an unrecognized opportunity to promote the catalytic umpolung reactivity of ambiphilic reagents with aryl halides, thus unlocking a new cross‐coupling strategy that complements existing methods for the preparation of densely functionalized alkyl‐substituted organometallic
Allylboronates from Vinyl Triflates and α-Chloroboronates by Reductive Nickel Catalysis
作者:Jin-Bao Qiao、Zhen-Zhen Zhao、Ya-Qian Zhang、Kai Yin、Zhi-Xiong Tian、Xing-Zhong Shu
DOI:10.1021/acs.orglett.0c01683
日期:2020.7.2
Allylboronates are unique buildingblocks widely used in organic synthesis, but the construction of cyclic allylboranates remains a challenging subject. We demonstrate here a mild and efficient access to this type of compound through the cross-electrophile coupling of vinyl triflates and α-chloroboronates. The reaction proceeded with a good substrate scope and good functional group compatibility. The
Deoxygenative Haloboration and Enantioselective Chloroboration of Carbonyls
作者:Dong Wang、Jun Zhou、Zihao Hu、Tao XU
DOI:10.1021/jacs.2c11024
日期:2022.12.21
α-haloboronates. Meanwhile, the difficult-to-obtain tertiary α-haloboronates can be also readily prepared via the same strategy with ketones. Furthermore, enantioselective chloroboration of carbonyls was successfully achieved to give chiral secondary or tertiary α-chloroboronates, the important intermediates to access enantioenrich multisubstituted stereocenters. These versatile products can be surprisingly attained
Stereospecific and Regioselective Synthesis of <i>E</i>-Allylic Alcohols through Reductive Cross Coupling of Terminal Alkynes
作者:Austin B. Shaff、Langxuan Yang、Mitchell T. Lee、Gojko Lalic
DOI:10.1021/jacs.3c06963
日期:——
convergent method for the synthesis of allylicalcohols that involves a reductive coupling of terminal alkynes with α-chloro boronic esters. The new method affords allylicalcohols with excellent regioselectivity (anti-Markovnikov) and an E/Z ratio greater than 200:1. The reaction can be performed in the presence of a wide range of functional groups and has a substrate scope that complements the stoichiometric