作者:Paul E. Gagnon、Jean L. Boivin、Méüde Tremblay
DOI:10.1139/v53-090
日期:1953.7.1
opyrazole yielded 1,4-diphenyl-5-aminopyrazole by hydrolysis and decarboxylation. The phenylhydrazone of ethyl phenyloxalacetate gave a pyrazolone which was transformed into 1,4-diphenyl-3-amino-5-pyrazolone. The 2,4-diphenyl-3-amino-5-pyrazolone was obtained from ethyl phenylcyanoacetate and phenylhydrazine by heating in acetic acid. 4-Alkyl-3-hydroxy- and 3-amino-5-pyrazolones and 4,4-dialkyl-3-oxo-
1,4-二苯基-3-carbethoxy-5-氨基吡唑通过水解和脱羧产生1,4-二苯基-5-氨基吡唑。苯基草乙酸乙酯的苯腙生成吡唑啉酮,后者转化为 1,4-二苯基-3-氨基-5-吡唑啉酮。2,4-二苯基-3-氨基-5-吡唑啉酮是由苯基氰基乙酸乙酯和苯肼通过在乙酸中加热得到的。4-烷基-3-羟基-和 3-氨基-5-吡唑啉酮和 4,4-二烷基-3-氧代-和 3-亚氨基-5-吡唑啉酮,在 2 位被碳酰氨基或 α- 或 β-萘基取代, 由单取代或双取代的丙二酸乙酯和氰基乙酸乙酯、4-苯基氨基脲以及α-和β-萘基肼制备。在中性和酸性溶液中测定紫外吸收光谱。