A Convenient Synthesis of Novel 1,3,4-Substituted 2-Pyrazoline-5-ones
作者:Dieter Sicker、Winfried Böhlmann、Detlef Bendler、Gerhard Mann
DOI:10.1055/s-1987-27980
日期:——
A number of new 1,3,4-substituted 2-pyrazoline-5-ones 3a-i have been prepared by addition of 1,3-substituted 2-pyrazoline-5-ones 1a-f to trichloroacetaldimine derivatives 2a-c.
Novel compounds are disclosed which are 4-amino-2,3-di-substituted-1-(mono- or trichlorophenyl)-3-pyrazolin-5-ones-representing by the following formulae (1) to (3); ##STR1## and acid addition salts thereof. The compounds can be easily produced and are useful for qualitative analysis or quantitative analysis of hydrogen peroxide when used as a component of a color indicator composition for detecting hydrogen peroxide.