Nickel chloride-catalyzed reaction of allylic acetates with O,O-dialkyl phosphonates

The synthesis of vinyl,aryl and allyl phosphonates,phosphinates and phosphine oxidesby the reaction of compounds of the type HP（O）RR（R,R=alkyl,aryl or alkoxy group）with alkenyl bromides,aryl bromides and 1,3-dienc under palladium catalysis have recentlybeen reported,but the yield of the latter was only about 10%.Fiaud has reported that allylacetate could react with lithium diphenyl phosphide,but the allyl phosphine was obtained withvery low yield.We have found that allylic acetates could react with O,O-dialkyl phosphon-ares under Ni（cod）catalysis in the presence of N,O-bis（trimethylsilyl）acetamide（BSA）to give