Palladium-catalyzed reactions of vinyl bromides with disubstituted alkynes: a new synthesis of fulvenes
作者:Lee J. Silverberg、Guangzhong Wu、Arnold L. Rheingold、Richard F. Heck
DOI:10.1016/0022-328x(91)80026-g
日期:1991.6
reaction of vinylic bromides with disubstituted acetylenes at 100°C in the presence of triethylamine produces penta- or hexa-substituted fulvenes in low to moderate yields. Reactions with 3-hexyne under the same conditions usually yield dialkylidenecyclopentenes as products, apparently by rearrangement of the expected fulvenes. Fulvenes formed from the reaction of disubstituted alkynes with Z-2-bromovinyl