A new cyclopropanation reaction involving Calpha-Si bond insertion of alkylidene carbenes derived from alpha-silyl ketones has been developed. This unprecedented alkylidene carbene reactivity features excellent selectivity for insertion into Calpha-Si bonds rather than insertion into Cgamma-H bonds or addition to gamma,delta-double or -triple bonds. The selectivity trend clearly indicates that the
已开发出一种新的
环丙烷化反应,该反应涉及衍生自 α-甲
硅烷基酮的亚烷基卡宾的 Cα-Si 键插入。这种前所未有的亚烷基卡宾反应性对插入 Calpha-Si 键具有出色的选择性,而不是插入 Cgamma-H 键或添加到 gamma、delta-双或-三键。选择性趋势清楚地表明,尽管 Calpha-Si 键插入仍然有效竞争,但系链中的 α-氧显着促进了 Cgamma-H 插入。