A novel method for a stereoselective synthesis of trienes and dienynes was developed by palladium catalyzed cross coupling reactions of an enol nonaflate with (vinyl)tributylstannanes and acetylenes in good to excellent yields. Here, the enol nonaflate exhibited a higher reactivity compared with the corresponding enol triflate in the coupling reactions.
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Wada et al. (2002) studied this question.