Benzocyclobutanol and benzocyclobutylamine derivatives have been obtained by visible-light-induced triplet biradical atom transfer of olefins. The reaction mechanism was investigated by deuterium-labeling and kinetic quenching experiments, as well as DFT calculations.
Continuous‐Flow Enantioselective Hydroacylations under Heterogeneous Chiral Rhodium Catalysts
作者:Yuki Saito、Shū Kobayashi
DOI:10.1002/anie.202313778
日期:2024.1.2
Heterogeneous chiral Rh catalysts were developed for continuous-flow enantioselective hydroacylations. The prepared catalysts exhibited excellent activity and enantioselectivity affording optically active ketones in quantitative yields with 99 % ee's without the leaching of Rh. The catalysts exhibited a wide substrate scope and, in sequential-flow reactions, the flow syntheses of value-added chemicals
开发了用于连续流对映选择性加氢酰化的非均相手性 Rh 催化剂。所制备的催化剂表现出优异的活性和对映选择性,以定量产率提供光学活性酮,其 ee 为 99%,且没有 Rh 浸出。该催化剂表现出广泛的底物范围,并且在顺序流动反应中,证明了增值化学品的流动合成。
Asymmetric Halocyclizations of 2-Vinylbenzyl Alcohols with Chiral FLPs
作者:Caifang Han、Xiangqing Feng、Haifeng Du
DOI:10.1021/acs.orglett.1c02361
日期:2021.10.1
Rhodium(II)- or Copper(I)-Catalyzed Formal Intramolecular Carbene Insertion into Vinylic C(sp<sup>2</sup>
)−H Bonds: Access to Substituted 1<i>H</i>
-Indenes
作者:Qi Zhou、Shichao Li、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201709375
日期:2017.12.11
A rhodium(II)‐ or copper(I)‐catalyzed formal intramolecular carbene insertion into vinylic C(sp2)−H bonds is reported herein. This method provides straightforward access to 1H‐indenes with high efficiency and excellent functional‐group compatibility. Mechanistically, the reaction is proposed to involve the following sequence: metal carbene formation, intramolecular nucleophilic addition of the double
Hydroacylation of 2-Vinyl Benzaldehyde Systems: An Efficient Method for the Synthesis of Chiral 3-Substituted Indanones
作者:Kousik Kundu、James V. McCullagh、Andrew T. Morehead
DOI:10.1021/ja0564416
日期:2005.11.23
Asymmetricrhodium-catalyzedhydroacylation has been utilized in the synthesis of 3-substituted indanones with high conversions and enantioselectivity. The hydroacylationreaction of 2-vinyl benzaldehyde had been previously reported to give a low yield of indanone and an unidentified product. We have identified this compound as a dimer of the starting material. Substitution at the alpha-position of