(Cyanomethylene)phosphoranes as Novel Carbonyl 1,1-Dipole Synthons: An Efficient Synthesis of .alpha.-Keto Acids, Esters, and Amides
作者:Harry H. Wasserman、Wen-Bin Ho
DOI:10.1021/jo00095a005
日期:1994.8
Carboxylic acids react with (cyanomethylene)triphenylphosphorane in the presence of EDCI to form cyano keto phosphoranes. The resulting ylides may then be oxidatively cleaved with ozone to form alpha,beta-diketonitriles. These highly electrophilic products may then be converted in situ to alpha-keto acids, esters, and amides.