Acylation studies in the thiophene and furan series. V. Thiophene carboxylic acids and semicarbazones derived from acetylthiophenes

HD Hartough, LG Conley

文献索引：Hartough; Conley Journal of the American Chemical Society, 1947 , vol. 69, p. 3096

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被引用次数: 47

摘要

The semicarbazones form easily in nearly quantitative yields but are somewhat unsuitable for identification purposes in that nearly all melt above 200'and most of them are extremely insoluble in most common solvents and are difficult to recrystallize. Despite recrystallization difficulties samples of high purity are obtained without recrystallization by digesting first with water and then with alcohol to remove impurities.