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Synthesis and crystal structure of 5‐pyrazol‐4,5‐dihydropyrazoles derivatives
Authors:Zhengfeng Xie  Xuexia Mo  Gang Liu  Fangming Liu
Institution:1. Education Ministry Key Laboratory of Oil & Gas Fine Chemicals, Xinjiang University, Urumqi 830046, PR China;2. College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 310012, PR China
Abstract: chemical structure image A series of 1‐acetyl(or phenyl)‐3‐aryl‐5‐(1‐phenyl‐3‐methyl‐5‐aryloxyl‐pyrazol)‐4,5‐dihydropyrazole derivatives have been efficiently synthesized under refluxing in glacial acetic acid with two kinds of hydrazines and five kinds of chalcones of 1‐phenyl‐methyl‐5‐phenoxyl‐pyrazol‐4‐aldehyde. The structures were confirmed on the basis of 1H NMR, IR, MS and element analysis, and the crystal structure of the compound 4c was determined by single crystal X‐ray diffraction. The compound 4c belongs to monoclinic system with space group P2(1)/n, a = 11.8779(3) nm, b = 12.0901(2) nm, c = 17.7004(4) nm, α = 90°, β = 100.05(10)°, γ = 90°, Formula weight: 549.46, Triclinic V = 2502.89(9) nm3, Dc = 1.458 Mg/m3, Z = 4, F (000) = 1128.
Keywords:
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