Synthesis of 1,4-disubstituted (E,Z)-1,3-dienes from lithium dicyclohexyl(trans-1-alkenyl)(1-alkynyl)borates
作者:George Zweifel、Stephen J. Backlund
DOI:10.1016/s0022-328x(00)84873-1
日期:1978.8
Treatment of lithium dicyclohexyl(trans-1-alkenyl)(1-alkynyl)borates with either boron trifluoride etherate or tri-n-butyltin chloride results in the preferential migration of the alkenyl group from boron to the adjacent alkynyl carbon atom. Protonolysis of the resultant organoboron intermediates with acetic acid affords the corresponding 1,4-disubstituted (E,Z)-1,3-dienes in good yields, provided