The aminopropylated Silica-Gel hydrochloride (APSG.HCl) proved to be an efficient catalyst for the rapid conversion of carbonyl compounds in the corresponding acetals with high yields and in mild and selective conditions. In addition to the obvious advantages offered by heterogeneous catalysis, the present method results very useful when the presence of a weakly-acidic function chemically bonded on
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。
Iron(III) Tosylate in the Preparation of Dimethyl and Diethyl Acetals from Ketones and <font> <b>β</b> </font>-Keto Enol Ethers from Cyclic <font> <b>β</b> </font>-Diketones
作者:Horacio Mansilla、María M. Afonso
DOI:10.1080/00397910802219361
日期:2008.7.24
Abstract An efficient method for conversion of ketones to their corresponding dimethyl and diethyl acetals and of cyclic β-diketones into β-keto enol ethers using Fe(OTs)3 as a catalyst is described.
The Enantioselective Total Synthesis of Exochomine
作者:Alison X. Gao、Tomoaki Hamada、Scott A. Snyder
DOI:10.1002/anie.201604744
日期:2016.8.22
centers connect two seemingly different halves or include a nitrogen atom. Herein, we describe an efficient approach to a molecule that combines both challenges in a single center in the form of exochomine. Failures in direct coupling led to a design fueled by highly specific reaction conditions for several steps and the development of an improved protocol for 1,4‐reduction in a hindered context where
Facilitating Myers–Saito cyclization through acid-triggered tautomerization for the development of maleimide-based antitumor agents
作者:Haotian Lu、Hailong Ma、Baojun Li、Mengsi Zhang、Huimin Chen、Yue Wang、Xinxin Li、Yun Ding、Aiguo Hu
DOI:10.1039/c9tb02589h
日期:——
Enyne-allene compounds undergo Myers–Saito cyclization at physiological temperature to generate diradical intermediates that are capable of inducing DNA damage and cell death.