Synthesis of sulfur-substituted quinolizidines and pyrido[1,2-a]azepines by ring-closing metathesis
作者:Shang-Shing P. Chou、Chu-Fang Liang、Tse-Ming Lee、Chih-Fen Liu
DOI:10.1016/j.tet.2007.05.104
日期:2007.8
Sulfur-substituted quinolizidines and pyrido[1,2-a]azepines (7) can be prepared by ring-closing metathesis (RCM) of 4-(phenylthio)-1,2,5,6-tetrahydropyridin-2-ones (6) bearing terminal alkenyl groups at both N-1 and C-6 positions, which are obtained from 3-(phenylthio)-3-sulfolene (1) in four steps. Some synthetic transformations of 2-(phenylthio)-1,6,9,9a-tetrahydroquinolizin-4-one (7a) and 2-(phenylthio)-1
可以通过4-(苯硫基)-1,2,5,6-四氢吡啶-2--2-酮的闭环复分解(RCM)制备硫取代的喹quin嗪和吡啶并[1,2- a ]氮杂pine(7)(6))在N-1和C-6位置均带有末端烯基,它们是由3-(苯硫基)-3-环丁砜(1)分四个步骤制得的。2-(苯硫基)-1,6,9,9a-四氢喹啉嗪-4-one(7a)和2-(苯硫基)-1,6,9,10,10a-五氢吡啶并[1,2- a]的一些合成转化还报道了] azepin-4-one(7d)。