Zang H, Su Q, Mo Y, Cheng B. Ionic liquid under ultrasonic irradiation towards a facile synthesis of pyrazolone derivatives.
ULTRASONICS SONOCHEMISTRY 2011;
18:68-72. [PMID:
20797895 DOI:
10.1016/j.ultsonch.2010.08.001]
[Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2010] [Revised: 07/30/2010] [Accepted: 08/01/2010] [Indexed: 05/29/2023]
Abstract
Ionic liquid [HMIM]HSO(4) was found to be an efficient catalyst for the synthesis of 4-[(5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)-phenyl-methyl]-5-methyl-2-phen-yl-1,2-dihydro-pyrazol-3-ones through the condensation reaction of arylaldehydes and 3-methyl-1-phenyl-5-pyrazolone under ultrasonic irradiation at room temperature. The present methodology offers several advantages such as excellent yields, simple procedure and mild conditions.
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