Inexpensive reagents for the synthesis of amides from esters and for regioselective opening of epoxides
作者:A. Solladie-Cavallo、M. Bencheqroun
DOI:10.1021/jo00048a011
日期:1992.10
Lithium aluminum amides [LiAl(NHR)4], 6a-6d, easily prepared in Et2O or THF from 1 equiv of LiAlH4 and 5 equiv of amine, proved to be efficient reagents for the synthesis of secondary amides from esters (approximately 100% with unhindered amines and 92% with tBuNH2). They also open aryl epoxides with very high regioselectivity to give 97-98% of the beta-amino-alpha-arylethanols (corresponding to the SN2 mechanism).
Synthesis of 2,2-dichloro-1,3-diarylaziridines by reduction of trichloroacetophenone imines
作者:Norbert De Kimpe、Roland Verhe、Laurent De Buyck、Niceas Schamp