Organocatalyzed stereoselective construction of N-formylpiperidines via a Michael-aza-Henry-hemiaminalization reaction cascade
作者:Ruchi Chawla、Ankita Rai、Atul K. Singh、Lal Dhar S. Yadav
DOI:10.1016/j.tetlet.2012.07.097
日期:2012.9
An efficient asymmetric synthesis of N-formylpiperidines via an organocatalytic Michael-aza-Henry-hemiaminalization reaction cascade of an aldehyde, a nitroalkene, and an N-arylideneformamide is reported. The reaction is triggered by diphenylprolinol trimethylsilyl ether and creates two C–C and one C–N bonds leading to the formation of highly enantio-enriched N-formylpiperidines with five contiguous
据报道,通过醛,硝基烯烃和N-亚芳基甲酰胺的有机催化Michael-Aza-Henry-半缩合反应级联,可以有效地不对称合成N-甲酰基哌啶。该反应由二苯基脯氨醇三甲基甲硅烷基醚触发,并产生两个C-C和一个C-N键,从而在一锅操作中形成具有五个连续手性中心的高度对映体富集的N-甲酰基哌啶。