Novel preparation of 1-aryl-3-(2-hydroxyphenyl)-2-pyrazolin-5-ones and their conversion into 2-aryl-4-methyl[1]benzopyrano[4,3-c]pyrazol-3(2H)-ones
Novel preparation of 1-aryl-3-(2-hydroxyphenyl)-2-pyrazolin-5-ones and their conversion into 2-aryl-4-methyl[1]benzopyrano[4,3-c]pyrazol-3(2H)-ones
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DOI：
10.1039/a605456k
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发表时间：
1997-01-01
影响因子：
--
通讯作者：
Titman, RB
中科院分区：
文献类型：
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作者：
Froggett, JA;Hockley, MH;Titman, RB
以4-羟基香豆素和芳基肼为原料，合成了1-芳基-3-（2-羟基苯基）-2-吡唑啉，再与原乙酸三乙酯环合，得到2-芳基-4-甲基[1]苯并吡喃[4.3-c]吡唑-3（2 H）-酮。
1-Aryl-3-(2-hydroxyphenyl)-2-pyrazolin- are prepared from 4-hydroxycoumarin and arylhydrazines and then cyclised with triethyl orthoacetate to give 2-aryl-4-methyl[1] benzopyrano[4.3-c] pyrazol-3(2H)-ones.