A Strictly “Pair”-Selective Synthesis of Conjugated Diynes via Pd-Catalyzed Cross Coupling of 1,3-Diynylzincs: A Superior Alternative to the Cadiot−Chodkiewicz Reaction
作者:Ei-ichi Negishi、Mitsuhiro Hata、Caiding Xu
DOI:10.1021/ol000270m
日期:2000.11.1
A strictly "pair"-selective synthesis of conjugated diynes viaPd-catalyzed cross coupling of 1,3-diynylzincs is described. This method, like the Cadiot-Chodkiewicz reaction, requires three steps for the synthesis of R(1)Ctbd1;CCtbd1;CR(2) from R(1)Ctbd1;CH, R(2)X, and HCtbd1;CH. However, the high "pair"-selectivity permitting high-yield production of the desired conjugated diynes without separation