Synthesis of 4-Alkyl- and 4-(ω-Chloroalkyl)-3-hydroxy-5-alkylidenebutenolides Based On Cyclizations of 4-Alkyl- and 4-(ω-Chloroalkyl)-1,3-bis(trimethylsilyloxy)buta-1,3-dienes with Oxalyl Chloride
作者:Peter Langer、Van Nguyen、Esen Bellur、Bettina Appel
DOI:10.1055/s-2006-942536
日期:2006.9
4-Alkyl- and 4-(ω-chloroalkyl)-1,3-bis(trimethylsilyloxy)buta-1,3-dienes were prepared from ethyl acetoacetate in three steps. Their cyclization with oxalyl chloride allowed an efficient synthesis of 4-alkyl- and 4-(ω-chloroalkyl)-5-alkylidenebutenolides.
4-烷基-和4-(ω-氯烷基)-1,3-双(三甲基甲硅烷氧基)丁-1,3-二烯由乙酰乙酸乙酯分三步制备。它们与草酰氯的环化允许有效合成 4-烷基-和 4-(ω-氯烷基)-5-亚烷基丁烯内酯。