作者:Vijaya Lingam Manthati、Danielle Grée、René Grée
DOI:10.1002/ejoc.200500200
日期:2005.9
The first synthesis of the 5,5-difluoro-(12R)- and -(12S)-leukotrienes B3 is reported which uses a flexible and convergent strategy. The key steps involve a Sonogashira coupling between the bromodienone 4 and the propargylic difluoride 5; this is followed by a CBS type reduction to establish the (12R) or (12S) stereocenters. A final semihydrogenation, under controlled conditions, affords the required
报道了 5,5-二氟-(12R)-和-(12S)-白三烯 B3 的首次合成,其使用灵活且收敛的策略。关键步骤涉及溴二烯酮 4 和炔丙基二氟化物 5 之间的 Sonogashira 偶联;然后是 CBS 类型的减少以建立 (12R) 或 (12S) 立体中心。在受控条件下进行最终的半氢化,提供所需的 E、E、Z 三烯系统。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)