作者:Alan W. Faull、Roy Hull
DOI:10.1039/p19810001078
日期:——
Phenyl isothiocyanate reacts with ethyl γ-chloroacetoacetate in the presence of sodium hydride to give ethyl 2-anilino-4-oxo-4,5-dihydrothiophen-3-carboxylate (1b). The compound (1b) shows typical reactions of a keto methylene compound; the Vilsmeier reagent and phosphorus oxychloride give the chloroformylthiophen (10). A possible sulphine derivative (11) is obtained from (1b) with thionyl chloride
在氢化钠的存在下,异硫氰酸苯基酯与γ-氯乙酰乙酸乙酯反应,生成2-苯胺基-4-氧代-4,5-二氢噻吩-3-羧酸乙酯(1b)。化合物(1b)表示酮亚甲基化合物的典型反应。用Vilsmeier试剂和三氯氧化磷得到氯甲酰噻吩(10)。从(1b)与亚硫酰氯获得可能的硫衍生物(11)。进一步利用氯甲酰基噻吩(10)可得到正常的芳族醛缩合产物,并与巯基乙酸酯一起生成噻吩并[3,2- b ]噻吩(25)。