Peglow TJ, Thomaz JPSSC, Nobre PC, Scimmi C, Santi C, Nascimento V. Efficient Synthesis and Iodine-Functionalization of Pyrazoles via KIO
3/PhSeSePh System under Acidic Conditions.
Chem Asian J 2024:e202400749. [PMID:
39163199 DOI:
10.1002/asia.202400749]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2024] [Revised: 08/19/2024] [Accepted: 08/20/2024] [Indexed: 08/22/2024]
Abstract
This manuscript reports a novel method for the direct iodination of the C-4 pyrazole ring generated in situ by the reaction of 1,1,3,3-tetramethoxypropane and various hydrazines. In this approach, potassium iodate (KIO3) is used as the iodinating agent and (PhSe)2 is used as catalysts under acidic conditions. This protocol provides a convenient method for the efficient synthesis of 4-iodo-1-aryl-1H-pyrazoles, valuable intermediates for several different coupling reactions.
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