A Convenient Synthesis of Novel 1,3,4-Substituted 2-Pyrazoline-5-ones

Abstract
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.

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