C. Patois et P. Savignac, 1,3-DIMETHYL-1,3,2-DIAZAPHOSPHOLIDINES-2-ONES - UNANTICIPATED PRECURSORS OF (Z) ACRILYC ACID-ESTERS, Phosphorus, sulfur and silicon and the related elements, 75(1-4), 1993, pp. 143-146
The title compounds allow the Wittig-Homer synthesis of acrylic acid e
sters with Z:E ratios superior to 90:10 (THF, Li+). The selectivity is
mainly controlled by the concentration and the temperature of the rea
ction medium.