Lewis Acid-Activated Reactions of Silyl Ketenes for the Preparation of α-Silyl Carbonyl Compounds
作者:Sarah M. Mitchell、Yuanhui Xiang、Rachael Matthews、Alexis M. Amburgey、Emily B. Pentzer
DOI:10.1021/acs.joc.9b01859
日期:2019.11.15
Silyl-substituted ketenes are attractive molecular building blocks due to their stability and ease of storage, as opposed to unstable alkyl and aryl ketenes. To better understand the reactivity of silyl ketenes and, in turn, their use in the preparation of highly functionalized small molecules, the reaction of silyl ketenes with different nucleophiles was studied. The addition of alcohol, amine, or
与不稳定的烷基和芳基乙烯酮相反,甲硅烷基取代的乙烯酮由于其稳定性和易于储存而成为有吸引力的分子构建基。为了更好地理解甲硅烷基烯酮的反应性,进而将其用于制备高度官能化的小分子,研究了甲硅烷基烯酮与不同亲核试剂的反应。将醇,胺或硫醇亲核试剂添加到甲硅烷基烯酮的中心碳上,然后进行质子转移,分别得到α-甲硅烷基酯,酰胺或硫代酯。催化量的路易斯酸大大提高了反应速率,并评估了亲核试剂,路易斯酸和甲硅烷基取代基的影响。由这些反应产生的小分子使人们深入了解了甲硅烷基烯酮作为复杂分子结构的基础。