Palladium-Catalyzed Double Annulations To Construct Multisubstituted Benzodifurans
作者:Zhiqiang Liang、Shengming Ma、Jihong Yu、Ruren Xu
DOI:10.1021/jo7016263
日期:2007.11.1
Efficient synthetic routes to construct multisubstituted benzo[1,2-b:5,4-b‘]difurans and benzo[1,2-b:4,5-b‘]difurans from bis(allyloxy)bis(alkynyl)benzenes or bis(alkynyl)dihydroxybenzenes and allylic halides utilizing palladium-catalyzed double annulations is reported. By further applying a double ring-closing metathesis reaction, pentacyclic compounds were also prepared.
有效的合成路线来构建多取代苯并[1,2- b:5,4- b “] difurans和苯并[1,2- b:4,5- b ”]由二difurans(烯丙氧基)双(炔基)苯或据报道,利用钯催化的双环双(炔基)二羟基苯和烯丙基卤化物。通过进一步进行双闭环复分解反应,还制备了五环化合物。
.alpha.-Heterosubstituted phosphonate carbanions. 11. Benzoins via an acyl anion equivalent. Novel one-pot preparation of benzo[b]furans via benzoins using hydriodic acid
作者:Rusty E. Koenigkramer、Hans Zimmer
DOI:10.1021/jo01308a009
日期:1980.9
KOENIGKRAMER R. E.; ZIMMER H., J. ORG. CEM., 1980, 45, NO 20, 3994-3998