Site-Selective Ni-Catalyzed Reductive Coupling of α-Haloboranes with Unactivated Olefins
作者:Shang-Zheng Sun、Marino Börjesson、Raul Martin-Montero、Ruben Martin
DOI:10.1021/jacs.8b09425
日期:2018.10.10
A mild, chemo- and site-selective catalytic protocol that allows for incorporating an alkylboron fragment into unactivated olefins is described. The use of internal olefins enables C-C bond-formation at remote sp3 C-H sites, constituting a complementary and conceptually different approach to existing borylation techniques that are currently available at sp3 centers.
描述了一种温和的、化学和位点选择性催化协议,允许将烷基硼片段纳入未活化的烯烃。内烯烃的使用能够在远程 sp3 CH 位点形成 CC 键,这构成了对当前在 sp3 中心可用的现有硼酸化技术的补充和概念上不同的方法。
A new, practical and efficient sulfone-mediated synthesis of trifluoromethyl ketones from alkyl and alkenyl bromides
We report herein a new and efficient method to prepare trifluoromethyl ketones from the corresponding bromides through sulfones in good yields. (c) 2005 Elsevier Ltd. All rights reserved.
Visible-light-promoted oxidative [4 + 2] cycloadditions of ε,3-unsaturated silyl enol ethers have been developed to efficiently and diastereoselectively construct polycyclic skeletons under mild conditions. The diastereoselectivities were dependent on the stereoconfiguration of silyl enol ether, substitutions on the link, as well as electric properties of substitutions on aryl rings. The intermediates