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。