A STUDY OF PYRAZOLIN-5-ONE TAUTOMERISM .I. SOME 3-UNSUBSTITUTED 1-ARYL-2-PYRAZOLIN-5-ONES

被引：50
作者：
NEWMAN, GA
PAUWELS, PJS
机构：
[1] Kodak Ltd., Liverpool, England, Kirkby
来源：
TETRAHEDRON | 1969年 / 25卷 / 18期
关键词：
D O I：
10.1016/S0040-4020(01)83004-0
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
The tautomerism of four 1-aryl-2-pyrazolin-5-ones not bearing a 3-substituent has been studied using NMR and IR spectroscopy. In carbon tetrachloride and chloroform solutions compounds without a 4-substituent exist essentially in the CH form (I). However, in the presence of a 4-ethoxycarbonyl substituent the NH form (II) is favoured. Results are also reported for all the compounds studied both in DMSO solution and in the solid state. © 1969.
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页码：4605 / &
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