Comments on the reaction of ethyl 4-(diethoxyphosphinyl)-3-oxobutanoate and related phosphonate esters with enals
作者:Cornelis M Moorhoff、David F Schneider
DOI:10.1016/s0040-4039(00)95781-2
日期:1987.1
Process for the preparation of 4-phosphinyl-3-keto-carboxylate and
申请人:E. R. Squibb & Sons, Inc.
公开号:US05298625A1
公开(公告)日:1994-03-29
A process for the preparation of compounds of formula ##STR1## or salt thereof where R.sub.1 is --X--Z and X is --C.tbd.C--, R.sub.2 and R.sub.2 ' are independently hydrogen, alkyl or trialkylsilyl; R.sub.3 is hydrogen or alkyl; and Z is a hydrophobic anchor; which includes reacting a compound of formula ##STR2## where R.sub.4 is alkyl, cycloalkyl or aryl; and R.sub.5 is trialkylsilyl or triarylsilyl with a compound of formula ##STR3## where Y is a halogen, to form a compound of formula ##STR4## and hydrolyzing the compound of formula IV to obtain the compounds of formula I. Compounds of formula I or salt thereof where R.sub.1 is --OR.sub.2 ' may be prepared by reacting a compound of formula III with a compound of formula P(OR.sub.2).sub.3 XII.