Synthetic Studies Towards Bridgehead Diprenyl-Substituted Bicyclo[3.3.1]nonane-2,9-diones as Models for Polyprenylated Acylphloroglucinol Construction
作者:Thomas Pouplin、Blanca Tolon、Philippe Nuhant、Bernard Delpech、Christian Marazano
DOI:10.1002/ejoc.200700430
日期:2007.10
The synthesis of bridgehead diprenylated bicyclo[3.3.1]nonane-2,9-dione, based on a reductive rearrangement of an enol lactone, is presented. The same target could be reached by a one-step sequence involving Michael addition of 2,6-diprenylcyclohexanone onto acrolein and intramolecular aldol reaction. The first method could be extended to the formation of a compound with gem-dimethyl substituents adjacent
介绍了基于烯醇内酯还原重排的桥头二异戊二烯化双环 [3.3.1] 壬烷-2,9-二酮的合成。通过一步序列可以达到相同的目标,包括将 2,6-二戊二烯基环己酮迈克尔加成到丙烯醛和分子内醛醇反应。第一种方法可以扩展到在桥头位置附近形成具有嵴二甲基取代基的化合物,但无法实现适当取代的烯醇内酯的构建,以制备聚异戊二烯化酰基间苯三酚。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)