取代的N-环己基酰胺经过锰配合物催化的H 2 O 2的脂族C–H键氧化。反应受扭转作用指导,导致顺式-1,4-,反式-1,3-和顺式-1,2-环己二酰胺的位点选择性氧化。相应的非对映异构体在相同条件下不反应。竞争性氧化4-取代N-环己基酰胺的顺-反混合物可导致顺式异构体的定量转化,从而可以分离和连续转化反式异构体转变成具有出色的位点选择性和良好的对映选择性的致密官能化的氧化产物。
A new strategy for the aza-Michael reaction of amides and ureas with α,β-unsaturated enones, which uses p-TsOH·H2O as an efficient and inexpensive catalyst under high-pressure conditions, has been developed.