Regio- and stereocontrolled preparation of α-substituted phosphonocrotonate derivatives
作者:Geoffrey F. Solberghe、István E. Markó
DOI:10.1016/s0040-4039(02)01001-8
日期:2002.7
Under suitable reaction conditions, monoalkylation of triethyl phosphonocrotonate 11 could be efficiently accomplished, leading to the preparation of a-substituted phosphonates 15. The reaction is totally regioselective and completely (E)-selective. The novel phosphonocrotonate 19 underwent smooth Horner-Emmons condensation, producing a key-precursor for the synthesis of the middle core of the manzamine alkaloids. (C) 2002 Elsevier Science Ltd. All rights reserved.