Synthesis of 1,3-dienes of (E,Z) configuration by a three-component coupling strategy
作者:James D. White、Mark S. Jensen
DOI:10.1016/0040-4020(95)00249-8
日期:1995.5
nucleophile, butadienyltriphenylphosphonium bromide, and an aldehyde gave conjugated dienes of predominantly (E,Z) configuration. Dianions of β-dicarbonyl systems and dicarboxylic acids, and monoanions of sulfones were employed as nucleophiles. Stereoselectivity in favor of an (E,Z)-1,3-diene was highest when a β-dicarbonyl dianion was used in conjunction with an α-branched aldehyde.
阴离子亲核试剂,丁二烯基三苯基溴化phosph和醛的三组分偶联产生了主要(E,Z)构型的共轭二烯。β-二羰基体系和二元羧酸的阴离子和砜的单阴离子被用作亲核试剂。当将β-二羰基二阴离子与α-支化醛结合使用时,对(E,Z)-1,3-二烯有利的立体选择性最高。