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Development and Mechanistic Studies of the Iridium‐Catalyzed C−H Alkenylation of Enamides with Vinyl Acetates: A Versatile Approach for Ketone Functionalization
作者:Bo Zhou、Xiaotian Qi、Peng Liu、Guangbin Dong
DOI:10.1002/anie.202107331
日期:2021.9.13
Ketone functionalization is a cornerstone of organic synthesis. Herein, we describe the development of an intermolecular C−H alkenylation of enamides with the feedstock chemical vinyl acetate to access diverse functionalized ketones. Enamides derived from various cyclic and acyclic ketones reacted efficiently, and a number of sensitive functional groups were tolerated. In this iridium-catalyzed transformation
Monothioacetals are obtained by treating the corresponding acetals with organotin thiophenoxides in the presence of BF2·OEt2. The reaction proceeds under mild conditions to provide the desired compounds with high selectivity.
Silylation of bicyclic six-membered nitronates. Ring—chain tautomerism of intermediate N,N bis(oxy)iminium cations
作者:V. O. Smirnov、Yu. A. Khomutova、A. A. Tishkov、S. L. Ioffe
DOI:10.1007/s11172-006-0549-8
日期:2006.11
Silylation of bicyclic six-membered nitronates was studied as a possible route to conjugated enoximes with a distant carbonyl group. Apart from the target enoximes, this reaction yielded nitrocompounds. The ratio of these two types of products and the configurations of their stereogenic centers depend on the nature and configurations of the starting nitronates and the silylation conditions. The results
Simple Method for the Preparation of Dimethyl Acetals from Ketones with Montmorillonite K 10 and p‐Toluenesulfonic Acid
作者:Horacio Mansilla、David Regás
DOI:10.1080/00397910600639315
日期:2006.6
Abstract A simple method for conversion of ketones to their corresponding dimethyl acetals using montmorillonite K 10 and p‐toluenesulfonic acid as acidic cocatalysts under very mild reaction conditions is described.
摘要描述了一种在非常温和的反应条件下使用蒙脱石 K 10 和对甲苯磺酸作为酸性助催化剂将酮转化为其相应二甲基缩醛的简单方法。