An efficient RhII -catalyzed synthesis of functionalized α-vinyl aldehydes with high E/Z stereoselectivity was developed. The reaction mediates the cyclopropanation of enaminones with vinyl carbenoids that are generated from cyclopropenes in situ to give the aminocyclopropane intermediates. Selective C-C bond cleavage of the cyclopropane intermediates leads to formation of α-vinyl aldehyde derivatives
开发了一种高效的RhII催化的具有高E / Z立体选择性的功能化α-
乙烯基醛的合成方法。该反应介导烯
氨基酮与
乙烯基类
胡萝卜素的
环丙烷化,该类
胡萝卜素是由环
丙烯原位生成的,从而得到
氨基
环丙烷中间体。
环丙烷中间体的选择性CC键裂解导致形成具有高E / Z选择性的α-
乙烯基醛衍
生物。该方法在室温下在非常温和的反应条件下进行,可在较宽的底物范围内使用。