The highly regioselective carbonylation of vinylsilanes
摘要:
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.
Highly regioselective carbonylation of vinylsilanes: a remarkable effect of organosilicon substituent
作者:Ryo Takeuchi、Naomi Ishii、Nobuhiro Sato
DOI:10.1039/c39910001247
日期:——
The Pd-catalysed hydroesterification of vinylsilanes affords β-silyl esters 1 in high yields with high selectivity, whereas α-silyl esters 2 are obtained in high yields with high selectivity by the Co catalyst.
Pd 催化乙烯基硅烷的氢酯化反应以高产率和高选择性得到 β-甲硅烷基酯 1,而通过 Co 催化剂以高产率和高选择性获得 α-甲硅烷基酯 2。
The highly regioselective carbonylation of vinylsilanes
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.