A Michael Addition and Alkylation Sequence Using Methyl 2-(Trimethylsilyl)propenoate. Stereoselective Synthesis of α-Silyl Esters
作者:Junji Tanaka、Shuji Kanemasa、Yusuke Ninomiya、Otohiko Tsuge
DOI:10.1246/bcsj.63.476
日期:1990.2
depending upon the reaction conditions and the reactivity of donor molecules. The adduct anions, both 1:1 and 1:2 types, are quenched with alkyl halides or water in a highly stereoselective manner to produce α-silylated esters. A rigid intramolecular chelation working in the adduct anions is partly responsible for the high selectivity.
有机镁或锂与 2-(三甲基甲硅烷基)丙烯酸甲酯的迈克尔加成产生 1:1 或 1:2 的加合物阴离子,这取决于反应条件和供体分子的反应性。1:1 和 1:2 类型的加合物阴离子以高度立体选择性的方式用卤代烷或水猝灭以产生 α-甲硅烷基化酯。在加合物阴离子中起作用的刚性分子内螯合是高选择性的部分原因。