申请人:Stauffer Chemical Company
公开号:US04695673A1
公开(公告)日:1987-09-22
An acylated 1,3-dicarbonyl compound is produced by rearrangement of the corresponding enol ester in the presence of a cyanide source. In one embodiment the cyanide source is employed with a molar excess of a moderate base, with respect to the enol ester. In another embodiment, the cyanide source is a stoichiometric amount, with respect to the enol ester, of potassium or lithium cyanide and a catalytic amount of a crown ether is used.
在一个实施例中,通过在存在氰源的情况下重新排列相应的烯醇酯,产生了一种酰化的1,3-二羰基化合物。在另一个实施例中,氰源与适量的中等碱(相对于烯醇酯)一起使用。氰源是与烯醇酯的化学计量量的钾或锂氰化物,并且使用了催化量的冠醚。