Umpoled oxime source: N‐Nitromethylphthalimide is an excellent hydroxymetanimidoyl anion equivalent; under iminium catalysis and optimized reaction conditions, it undergoes a clean and highly enantioselective Michael addition to enals (see scheme). The nitro(phthalimido)methyl moiety can be then directly converted into an oxime moiety by a simple and high‐yielding protocol.
肟的来源:N-硝基甲基邻苯二甲
酰亚胺是一种出色的羟基甲
亚胺基阴离子当量。在
亚胺催化和优化的反应条件下,它会对烯类进行干净且高度对映选择性的迈克尔加成反应(请参见方案)。然后可以通过简单且高产的方法将硝基(邻苯二甲
酰亚胺基)甲基部分直接转化为
肟部分。