Catalytic multicomponent cycloaddition assembling three different substances to form highly substituted bicyclo[4.2.0]octanes
作者:Kiyosei Takasu、Kazato Inanaga、Masataka Ihara
DOI:10.1016/j.tetlet.2008.05.001
日期:2008.6
A catalytic multicomponent (4+2)–(2+2) cascade cycloaddition process assembling three different substances has been developed. The process is able to rapidly provide a highly substitutedbicyclo[4.2.0]octane skeleton from a 2-siloxydiene and two molecules of α,β-unsaturated carbonyl partners. The MCR process is accompanied by stereoselective formation of four carbon–carbon bonds and four stereogenic
Rapid Assembly of Polycyclic Substances by a Multicomponent Cascade (4 + 2)−(2 + 2) Cycloadditions: Total Synthesis of the Proposed Structure of Paesslerin A
作者:Kazato Inanaga、Kiyosei Takasu、Masataka Ihara
DOI:10.1021/ja039808k
日期:2004.2.1
A versatile method for stereoselective formation of multisubstituted bicyclo[4.2.0]octane framework has been developed by means of catalytic (4 + 2)-(2 + 2) cycloaddition reactions. Its application to the synthesis of a substance reported to be the cytotoxic sesquiterpene, paesslerin A, is described, and it has been made clear that a revision of the structure of natural paesslerin A is required.
已经通过催化 (4 + 2)-(2 + 2) 环加成反应开发了立体选择性形成多取代双环 [4.2.0] 辛烷骨架的通用方法。描述了其在合成一种被报道为具有细胞毒性的倍半萜烯的物质 paesslerin A 中的应用,并且已经明确需要对天然 paesslerin A 的结构进行修改。