Synthesis of γ-Alkylidenebutenolides by Formal [3+2] Cyclizations of 1,5- and 2,4-Bis(trimethylsilyloxy)-1,3,5-hexatrienes with Oxalyl Chloride
作者:Ilia Freifeld、Gopal Bose、Tobias Eckardt、Peter Langer
DOI:10.1002/ejoc.200600398
日期:2007.1
γ-alkylidenebutenolides, while the cyclization of a 2,4-bis(trimethylsilyloxy)-1,3,5-hexatriene with oxalyl chloride afforded a γ-(2-oxobut-3-en-1-ylidene)butenolide, permitting a formal synthesis of the natural product lucidone. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
路易斯酸催化的 1,5-双(三甲基甲硅烷氧基)-1,3,5-己三烯和 1,3,5-三(三甲基甲硅烷氧基)-1,3,5-己三烯与草酰氯的环化导致形成多不饱和γ-亚烷基丁烯内酯,而 2,4-双(三甲基甲硅烷氧基)-1,3,5-己三烯与草酰氯的环化得到 γ-(2-oxobut-3-en-1-ylidene)butenolide,允许形成天然产物lucidone的合成。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)