作者:Ryo Takeuchi、Naomi Ishii、Masaharu Sugiura、Nobuhiro Sato
DOI:10.1021/jo00041a025
日期:1992.7
The hydroesterification of vinylsilanes, catalyzed by transition-metal complexes, afforded both beta-silyl esters 2 and alpha-silyl esters 3 in high yield. The Pd(II) complex-catalyzed reaction showed high beta-regioselectivity, whereas the Co2(CO)8-catalyzed reaction showed high alpha-regioselectivity. Vinylsilanes which bore trialkyl-, diphenylmethyl-, dimethylethoxy-, trimethoxy-, diphenylfluoro-, and difluorophenylsilyl groups were regioselectively, and some cases regiospecifically, hydroesterified. Pd(II) complexes were also shown to be effective catalysts of the hydrocarboxylation of vinylsilanes. Hydrocarboxylation was beta-regiospecific and gave excellent yields of beta-silyl carboxylic acids. Reasonable mechanisms for the reactions are described.