Chemoselective Luche-Type Reduction of α,β-Unsaturated Ketones by Magnesium Catalysis
作者:Yoon Kyung Jang、Marc Magre、Magnus Rueping
DOI:10.1021/acs.orglett.9b03131
日期:2019.10.18
The chemoselective reduction of α,β-unsaturatedketones by use of an economic and readily available Mg catalyst has been developed. Excellent yields for a wide range of ketones have been achieved under mild reaction conditions, short times, and low catalyst loadings (0.2-0.5 mol %).
Synthesis of α,β-Unsaturated Acylsilanes via Perrhenate-Catalyzed Meyer–Schuster Rearrangement of 1-Silylalkyn-3-ols
作者:Andrei Nikolaev、Arturo Orellana
DOI:10.1021/acs.orglett.5b02909
日期:2015.12.4
via the perrhenate-catalyzed Meyer–Schuster rearrangement of 1-silylalkyn-3-ols. Propargylic alcohols derived from TES-acetylene and substituted benzaldehydes can be converted to acylsilanes using a combination of p-TSA·H2O and n-Bu4N·ReO4, or Ph3SiOReO3 in good yields. Some propargylic alcohols derived from ketones, as well as aliphatic and unsaturated aldehydes, can also be converted to acylsilanes;
Rhodium-Catalyzed Isomerization of α-Arylpropargyl Alcohols to Indanones: Involvement of an Unexpected Reaction Cascade
作者:Ryo Shintani、Kazuhiro Okamoto、Tamio Hayashi
DOI:10.1021/ja042582g
日期:2005.3.9
alkynes + aromatic aldehydes), this method provides a new way of constructing indanones with high efficiency. By the mechanistic investigations using deuterium-labeled substrates, it has also been demonstrated that the reaction goes through an unexpected cascade, with a 1,4-hydrogen shift being the turnover-limiting step of the catalytic cycle.
powerful tool for synthesizing organosilicons. However, chemodivergent synthesis of structurally diverse organosilicons via controllable C–Si bond activation remains challenging. Herein, we report a rhodium-catalyzed chemodivergent synthesis of organosilicons by controllable C–Si bond activation. This protocol enables the rapid synthesis of four types of organosilicons, including allyl silyl ethers
作者:Shenghan Teng、Zhenguo Zhang、Bohan Li、Lanyang Li、Melinda Chor Li Tan、Zhenhua Jia、Teck‐Peng Loh
DOI:10.1002/anie.202311906
日期:2023.11.6
A novel type of silicon-containing alkynone reagents that target free thiols to produce the stable vinyl-sulfide linker under biocompatible conditions is reported. Besides simple aliphatic and aromatic thiols, this approach is also applicable to the labeling of thiols present in proteins, sugars and pharmaceuticals with full retention of silicon handles in most cases.