Palladium-catalyzed enantioselective decarboxylative allylic alkylation of fully substituted <i>N</i>-acyl indole-derived enol carbonates
作者:Eric J. Alexy、Tyler J. Fulton、Haiming Zhang、Brian M. Stoltz
DOI:10.1039/c9sc01726g
日期:——
The first enantioselective palladium-catalyzed decarboxylative allylic alkylation of fully substituted N-acyl indole-derived enol carbonates forming acyclic all-carbon quaternary stereocenters is reported. Excellent yields up to 99% and enantioselectivities up to 98% ee are obtained through the use of a new electron-deficient phosphinoxazoline (PHOX) ligand. Control of substrate enolate geometry is
报道了形成完全无环全碳季立体中心的完全取代的N-酰基吲哚衍生的烯醇碳酸酯的第一对映选择性钯催化的脱羧烯丙基烷基化。通过使用新的电子缺陷型膦恶唑啉(PHOX)配体,可获得高达99%的优异收率和高达98%ee的对映选择性。底物烯醇盐几何形状的控制对于高选择性至关重要。所获得的α-季N-酰基吲哚是正式的酯等效物,并且代表了用于进一步合成转化的有用方法。