Morita–Baylis–Hillman carbonates of 2-cyclopentenone under Pd(0) catalysis could be umpolunged by regioselectively forming η2-Pd(0) complexes via π-Lewis base activation, and underwent asymmetric inverse-electron-demand oxa-Diels–Alder reaction with α-cyano chalcones. An array of fused pyran frameworks with dense substitutions was constructed with excellent stereoselectivity (up to 99% ee, >19:1 dr), which could
在这里,我们发现
2-环戊烯酮的Morita-Baylis-Hillman
碳酸盐在Pd(0)催化下生成的二烯酮可以通过π-Lewis碱活化区域选择性地形成η 2 -Pd(0)络合物而发生反极化,并经历不对称逆反应- 与 α-
氰基
查尔酮的电子需求 oxa-Diels-Alder 反应。构建了一系列具有密集取代的稠合
吡喃框架,具有出色的立体选择性(高达 99% ee,>19:1 dr),可以对其进行精心设计以获得具有更高分子复杂性的对映体富集结构。