Synthesis of 1‐substituted 5‐aryl‐3‐styryl‐2‐pyrazolines and 3‐aryl‐5‐styryl‐2‐pyrazolines by the reaction of dibenzylideneacetones and E,E‐cinnamylideneacetophenones with hydrazines
作者： Albert Lévai , József Jekó
关键词: Organic chemistry 、 Hydrazine 、 Hydrate 、 Acetic acid 、 Aryl 、 Chemistry
摘要: The reaction of dibenzylideneacetones or E,E-cinnamylidene- acetophenones and hydrazine hydrate provided 1-propionyl derivatives 5-aryl-3-styryl-2-pyrazolines 3-aryl-5-styryl-2-pyrazolines. These unsaturated ketones afforded 1-(2-carboxyphenyl) 1-(4-carboxyphenyl) 3-aryl-5-styryl-2-pyrazolines on treatment with (2-carboxyphenyl)-hydrazine (4-carboxyphenyl)hydrazine in hot acetic acid. Structures all new 2-pyrazolines have been elucidated by microanalyses a combined utilization various spectroscopic methods.
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