反应详情

The 3-ethoxypropionylmethylenetriphenylphosphorane (m.p. 63°-65° C.), used as a starting material in the above preparation, was prepared from 1-chloro-4-ethoxybutan-2-one, via 4-ethoxy-2-oxobutyltriphenylphosphonium chloride (m.p. 157°-160° C.), by proceeding in a similar manner to that hereinbefore described in Example 3(i) for the preparation of hexanoylmethylenetriphenylphosphorane from 1-chloroheptan-2-one.