L. Anastasia et E. Negishi, Highly satisfactory procedures for the Pd-catalyzed cross coupling of arylelectrophiles with in situ generated alkynylzinc derivatives, ORG LETT, 3(20), 2001, pp. 3111-3113
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Two new and very efficient procedures (Procedures A and B) are reported for
the Pd-catalyzed cross coupling of aryl electrophiles; with terminal alkyn
es via their in situ conversion into alkynylzinc derivatives. Procedure A i
s particularly valuable in cases where electron-deficient alkynes are used,
while Procedure B is operationally simple and very satisfactory in less de
manding cases.