(E)-1-Alkenyl alkyl ketones [(E)-α-Enones] are prepared in high yields and with high stereoselectivity by reaction of (2-oxoalkyl)triphenylarsonium bromides with aldehydes under solid-liquid phase-transfer conditions. Application of this methodology to the preparation of key intermediates for the synthesis of brassinosteroid and prostaglandin PGF2α is also reported.
(E)-1-烯基烷基酮[(E)-α-烯酮]通过(2-氧代烷基)三苯基
砷溴化物与醛在固-液相转移条件下反应制备,具有高产率和高立体选择性。本文还报道了将这种方法应用于制备植物激素
油菜素内酯和
前列腺素PGF2α的关键中间体。