<i>N</i>-Alkylation of α-Iminophosphonates and Application to Horner–Wadsworth–Emmons Reaction
作者:Makoto Shimizu、Masasato Tateishi、Isao Mizota
DOI:10.1246/cl.140763
日期:2014.11.5
N-Alkylation of α-iminophosphonates with Grignard reagents gives α-N-alkylaminophosphonates. A subsequent Horner–Wadsworth–Emmons reaction of the intermediary α-metalated phosphonate takes place with aldehydes to give enamines. The enamine thus prepared reacts with MVK to give a four-component coupling product.
Catalytic Hydrogenation of α-Iminophosphonates as a Method for the Synthesis of Racemic and Optically Active α-Aminophosphonates
作者:Nataliya S. Goulioukina、Grigorii N. Bondarenko、Sergey E. Lyubimov、Vadim A. Davankov、Konstantin N. Gavrilov、Irina P. Beletskaya
DOI:10.1002/adsc.200700466
日期:2008.2.22
It was shown that the catalytic hydrogenation of α-iminophosphonates by molecular hydrogen can serve as a convenient method for the synthesis of racemic and opticallyactive α-aminophosphonates. Up to 94% ee was achieved in the rhodium-catalyzed enantioselective hydrogenation using chiral ligand (R)-BINAP.