K. Takai et al., FORMAL HYDROALLYLATION OF CARBON-CARBON TRIPLE BONDS VIA TANTALUM-ALKYNE COMPLEXES - STEREOSELECTIVE PREPARATION OF 1,4-DIENES, Chemistry Letters, (4), 1995, pp. 315-316
Treatment of tantalum-alkyne complexes with lithium salts of allylic a
lcohols in DME-benzene-THF (1:1:1) at 25 degrees C for several hours g
ives 1,4-dienes stereoselectively in good to excellent yields.