A wide range of aryl substituted chloro and bromo olefins has been pre
pared by treating alpha-chloro and alpha-bromophosphonates derived fro
m 1-hydrido-5,5-dimethyl-1,3,2-dioxaphosphorinane with sodium hydride
in THF at 0 degrees C followed by an aldehyde. (C) 1997 Published by E
lsevier Science Ltd.