A regio- and chemoselective silylzincation reaction of various functionalized alkynes was developed using a newly designed dianion-type zincate. Silylzincation of terminal alkynes, followed by electrophilic trapping, proved to be a powerful tool for the one-pot, regiocontrolled generation of trisubstituted functionalized alkenes. The functionalized vinylzincate intermediate also undergoes copper- and palladium-catalyzed C-C bond-forming reactions in high yields and with high regio- and chemoselectivities.
KOREEDA, MASATO;GEORGE, IRENE A., CHEM. LETT.,(1990) N, C. 83-86