Tandem Addition of Trialkyl Phosphites to α,β-Unsaturated Imines: A Comparison with Silylated Phosphites
作者:Ellen Van Meenen、Kristof Moonen、Annelies Verwée、Christian V. Stevens
DOI:10.1021/jo061256b
日期:2006.9.1
Trialkyl phosphites were evaluated for addition reactions to α,β-unsaturatedimines. An acidic medium is required to allow consecutive 1,4- and 1,2-addition to occur. In this manner, 3-phosphonyl-1-aminophosphonates, phosphonic acidanalogues of glutamate, are obtained in good yields (32−90%). The reaction is mainly influenced by the steric bulk of the nitrogen substituent: less steric N-substituents