A stereoselective synthesis of trisubstituted alkenes. Part 2. The nickel-catalysed coupling of Grignard reagents with 6-alkyl-3,4-dihydro-2H-pyrans and acyclic enol ethers
作者:Philip A. Ashworth、Nicholas J. Dixon、Philip J. Kocieński、Sjoerd N. Wadman
DOI:10.1039/p19920003431
日期:——
The Ni0-catalysed coupling of Grignard reagents devoid of beta-hydrogens with 6-alkyl-3,4-dihydro-2H-pyrans and acyclic enol ethers is highly stereoselective and gives trisubstituted alkenes with retention of configuration. The reaction was applied to syntheses of the aggregation pheromone of the square-necked grain beetle, a fragment of Premonensin B, and the polyketide fragment of Jaspamide.
A stereoselective synthesis of the C(8)-C(20) fragment of premonensin B
作者:Philip Kocieński、Sjoerd Wadmana、Kelvin Cooper
DOI:10.1016/s0040-4039(00)86059-1
日期:1988.1
Two stereoselective Ni(O)-catalysed coupling reactions of MeMgBr with cyclic enol ether intermediates were key steps in the synthesis of the C(8)-C(20) fragment (5B) of Premonensin B.