A cascade vinylogous 1,6-Michael addition/1,4-proton shift/aza-Michael addition/hemiaminal formation sequence of 1,2-diaza-1,3-dienes and β-substituted 2-butenals has been developed under the influence of dienamine activation of a chiral secondary amine. This method exhibits high regio- and chemoselectivity and provides an efficient and straightforward approach to bicyclic l,8-diazabicyclo[3.3.0]octane
在这种影响下,已经开发出1,2-二氮杂-1,3-二烯和β-取代的
2-丁烯醛的级联
乙烯基1,6-迈克尔加成/ 1,4-质子移位/氮杂-迈克尔加成/血红素形成序列手性仲胺的二烯胺活化反应。该方法表现出高的区域选择性和
化学选择性,并为具有四取代立体异构中心的双环1,8-二
氮杂双环[3.3.0]
辛烷骨架提供了一种有效而直接的方法,其对映选择性很好。