An efficient regioselective copper catalyzed multi-component synthesis of 1, 3-disubstituted pyrazoles

…, SB Meruva, R Mekala, KR Rao, T Krishna, RG Chary…

Index: Raghunadh, Akula; Meruva, Suresh Babu; Mekala, Ramamohan; Raghavendra Rao; Krishna, Thalishetti; Gangadhara Chary; Vaikunta Rao; Syam Kumar Tetrahedron Letters, 2014 , vol. 55, # 18 p. 2986 - 2990

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Citation Number: 8

Abstract

Abstract An efficient synthesis of unsymmetrically substituted 1, 3-pyrazole derivatives has been developed via three-component coupling reaction involving 3-(dimethylamino)-1- phenylprop-2-en-1-one, hydrazine, and aryl halides in one pot process exhibiting high regioselectivity. The pyrazole synthesis proceeds via a sequential series of reactions such as Michael addition, heterocyclization, dehydration, and Ullmann cross-coupling.