Highly stabilized sulfonium diacethylides (1a-c) reacted with acetyl chloride to give a mixture of the enol acetates (2a-c) and the enol diacetates (3a-c). Similarly, sulfonium acetylcarbomethoxymethylides (5a, b) gave the enol acetates (6a, b). These enol acetates were hydropyzed with HCl-MeOH to give 3-methylthio- (3-phenylthio-)2, 4-pentanediones (4a, b) or methyl 2-methylthio- (2-phenylthio-)acetoacetates (7a, b).
高度稳定的磺阳离子二
乙炔(1a-c)与
氯乙酰反应生成了烯醇
乙酸盐(2a-c)和烯醇二
乙酸盐(3a-c)的混合物。类似地,磺阳离子乙酰碳甲氧基甲基化合物(5a,b)也生成了烯醇
乙酸盐(6a,b)。这些烯醇
乙酸盐在
盐酸-
甲醇的作用下进行了
水解,生成了3-甲
硫基-(3-苯
硫基-)
2,4-戊二酮(4a,b)或甲基2-甲
硫基-(2-苯
硫基-)乙酰
乙酸盐(7a,b)。