A novel, versatile synthetic approach to linearly fused tricyclopentanoids via photo-thermal olefin metathesis
作者:Goverdhan Mehta、A. Srikrishna、A.Veera Reddy、Mangalam S. Nair
DOI:10.1016/0040-4020(81)80021-x
日期:1981.1
the cyclobutane ring gave cis, syn, cis-tricyclo [6.3.0.02,6]undeca-4,9-dien-3,11-diones (11a–11j, 15a,b in just three steps and in exceptionally good yields. A few interesting transformations of the readily available parent bis-enone 11a which indicates its wider uses in syntheses, are described. Finally, a smooth thermal isomerisation of cis, syn, cis-bis-enones to cis, anti, cis-bis-enones is reported
描绘了十五种新的,快速且通用的方法,以线性融合的三环戊烷为载体,其具有当代高度关注的三环[6.3.0.0 2,6 ]十一烷(三喹烷)骨架。在我们合成三喹烷的过程中,关键概念是廉价的,可大量利用的1,3环戊二烯与对苯醌的Diels-Alder加合物的新颖光热烯烃复分解反应。因此,内-三环[6.2.1.0 2,7 ]十一烷-4,9-二烯-3,6-二酮(9a – 9j,13a,b)的光解提供了五环[5.4.0.0 2,6 .0 3,10 .0 5,9 ] undecan-8,11-diones(10a – 10j,14a,b),其在环丁烷环热裂解后得到顺,顺,顺-三环[6.3.0.0 2,6 ] undeca -4,9-dien-3,11-二酮(11a – 11j,15a,b在只需三个步骤和在特别好的产率。在容易获得的亲双烯酮的一些有趣的转换部11a,其指示在合成其更为广泛的用途,进行了描述。最