A. Kiehl et al., ALPHA,OMEGA-DIALKYL-SUBSTITUTED POLYENES BY PALLADINM-CATALYZED COUPLING REACTIONS OF VINYLTIN COMPOUNDS WITH VINYL HALIDES, Liebigs Annalen, (2), 1995, pp. 223-230
alpha,omega-Dialkyl-substituted linear polyenes are synthesized in goo
d yields by the palladium-catalyzed coupling reaction of trialkyltin-
and iodo-substituted olefinic precursors. Central building blocks are
the distannylated butadiene 8 and vinyl iodide 3. Our synthetic strate
gy was successfully applied to the preparation of the tert-butyl polye
nes 13, 14, and 15 as well as polyenes 25 and 26 with longer alpha, om
ega-dialkyl chains.