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)