作者:Muhammad Iqbal、Imam Bakhsh Baloch、Musa Kaleem Baloch
DOI:10.14233/ajchem.2013.15179
日期:——
Four alkyl g-ketohexanoates (3a-3d) have been prepared from succinic anhydride employing a three step reaction strategy. In the first step using p-toluene sulfonic acid as catalyst, the ring of succinic anhydride was opened with isopropyl, isobutyl, isopentyl and benzyl alcohols, respectively to form alkyl hydrogen succinates (1a-1d). In the 2nd step these alkyl hydrogen succinates on treatment with SOCl2 yielded 4-alkoxy-4-ketobutanoyl chlorides (2a-2d). The acid halides thus obtained, on reaction with diethyl cadmium led to require g-ketoesters. All the synthesised compounds were characterized by recording and analyzing 1H, 13C NMR, IR spectra and mass measurements.
四种烷基g-酮己酸酯(3a-3d)是通过三步反应策略从琥珀酸酐制备而成。在第一步中,使用对甲苯磺酸作为催化剂,分别用异丙醇、异丁醇、异戊醇和苄醇打开琥珀酸酐的环,形成烷基氢琥珀酸酯(1a-1d)。在第二步中,这些烷基氢琥珀酸酯与SOCl2处理,生成4-烷氧基-4-酮丁酰氯(2a-2d)。所获得的酸卤化物与二乙基镉反应,得到所需的g-酮酯。所有合成的化合物通过记录和分析1H和13C NMR、红外光谱及质谱进行表征。