F. Liron et al., Regiochemical control in the hydrostannylation of aryl substituted alkynes: A stereoselective synthesis of disubstituted vinylstannanes, SYNLETT, (2), 1999, pp. 246-248
The palladium-catalyzed stereoselective hydrostannylation of various aryl s
ubstituted alkynes 1 in THF is described. The reaction is remarkably regios
elective and affords mainly to exclusively the alpha-isomers 2 in the case
of alkynes bearing electron accepters in para-position and ortho-substitute
d alkynes regardless of the electronic nature of the substituent.