Synthesis of homofarnesenes: trail pheromone components of the fire ant,
作者:Francisco M. Alvarez、Robert K. Vander Meer、Clifford S. Lofgren
DOI:10.1016/s0040-4020(01)86827-7
日期:1987.1
The synthesis of tour isomeric homofarnesenes, 3,4,7,11-tetramethyl-1, 3,6,10-dodecatetraenes, is reported. The major synthetic step was the indirect formation of a tetra-substituted double bond through the acid catalyzed oxidative rearrangement of an appropriate vinyl carbinol. Two of these compounds, the Z,E- and E,E- isomers were identical to two naturallyoccuring homofarnesene components of the
A Cu/Pd-catalyzed allylboration of alkynes with allyl carbonates and bis(pinacolato)diboron to afford borylated skipped dienes is reported. Synergistic Cu and Pd catalysis enables this protocol to work for a wide array of alkynes and allyl carbonates under mild conditions with total regio- and stereocontrol. This transformation features the catalytic generation of β-borylalkenylcopper intermediates