作者:Paul E. Gagnon、Jean L. Boivin、Alexander Chisholm
DOI:10.1139/v52-109
日期:1952.11.1
directly from methylhydrazine and ethyl α-cyanopropionate. A series of 3-imino-2-methyl-5-pyrazolones monosubstituted in position 4 with pentyl, hexyl, heptyl, and octyl groups and another series disubstituted in position 4 with butyl, hexyl, and heptyl groups were also prepared from the corresponding mono- and disubstituted cyanoacetates and methylhydrazine.The ultraviolet absorption spectra were determined
1,4-二甲基-3-氨基-5-吡唑啉酮和4-甲基-和4-乙基-3-氨基-1-苯基-5-吡唑啉酮由α-酮酯和甲基-和苯肼合成。首先获得的腙转化为在3位具有碳乙氧基的吡唑啉酮,通过Curtius降解将其转化为氨基。2,4-二甲基-3-氨基-5-吡唑啉酮直接从甲基肼和α-氰基丙酸乙酯中获得。一系列 3-亚氨基-2-甲基-5-吡唑啉酮在 4 位被戊基、己基、庚基和辛基单取代,另一个系列在 4 位被丁基、己基和庚基双取代。 - 和二取代的氰基乙酸盐和甲基肼。紫外吸收光谱在中性和酸性介质中测定。