Direct Preparation of 7-Allyl- and 7-Arylindolines
作者:Daniele Leonori、Iain Coldham
DOI:10.1002/adsc.200900499
日期:2009.11
allyl halides to the organolithium species derived from lithiation of N-tert-butoxycarbonylindoline with sec-butyllithium (sec-BuLi) and tetramethylethylenediamine (TMEDA) occurs regioselectively by SN2 allylation. In contrast, the organolithium species can be transmetalated to the mixed zinc cuprate that undergoes regioselective SN2′ allylations. Transmetalation to the organozinc chloride allows a Negishi-type
烯丙基卤化物从锂化衍生的有机锂物质加成ñ -叔-butoxycarbonylindoline与秒-丁基锂(秒正丁基锂)和四甲基乙二胺(TMEDA)用S区域选择性地发生Ñ 2烯丙基化。相反,有机锂物质可以被金属转移到经历区域选择性的S N 2'烯丙基化的混合铜酸锌中。使用三苯基膦(PPh 3)作为配体的钯催化,金属转移至有机氯化锌可实现与芳基溴化物的Negishi型交叉偶联反应。该化学方法被用于非常短的7-异戊烯基吲哚和生物碱vasconine的合成。
Boit; Ehmke, Chemische Berichte, 1957, vol. 90, p. 369,373
作者:Boit、Ehmke
DOI:——
日期:——
Concise Synthesis of Narcissus Pyrrolophenanthridine Alkaloids: Vasconine, Assoanine and Oxoassoanine
作者:Jason S. Parnes、David S. Carter、Lilia J. Kurz、Lee A. Flippin