STUDIES ON STOBBE CONDENSATION: REACTIONS OF ALDEHYDES AND KETONES WITH DIMETHYL METHYLSUCCINATE
作者:A. M. El-Abbady、H. H. Mousa
DOI:10.1139/v65-119
日期:1965.4.1
Benzaldehyde, o-methoxybenzaldehyde, p-chlorobenzaldehyde, benzophenone, and acetophenone are condensed with dimethyl methylsuccinate in the presence of potassium tert-butoxide to give the corresponding β-half-esters. In the case of o-methoxybenzaldehyde the lactonic acid (IX) is also obtained. The β-half-esters are cyclized by sodium acetate and acetic anhydride to the corresponding acetoxynaphthoates
苯甲醛、邻甲氧基苯甲醛、对氯苯甲醛、二苯甲酮和苯乙酮在叔丁醇钾存在下与甲基琥珀酸二甲酯缩合得到相应的β-半酯。在邻甲氧基苯甲醛的情况下,还获得内酯酸(IX)。β-半酯被乙酸钠和乙酸酐环化成相应的乙酰氧基萘甲酸酯,后者被转化为甲氧基萘甲酸酯。β-半酯的碱性水解产生相应的衣康酸,其酸酐转化为其α-半酯。