… : A Novel Two??Step Procedure for the Synthesis of New Derivatives of 1 H??Imidazo [1, 2??b]??pyrazole by the Cyclocondensation Between 5??Amino??4??cyano??3??phenyl …

…, Z Guilong, W Lirong, Y Huazheng

Index: Ming, Li; Guilong, Zhao; Lirong, Wen; Huazheng, Yang Synthetic Communications, 2005 , vol. 35, # 4 p. 493 - 501

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Citation Number: 10

Abstract

Abstract A series of new 7??cyano??6??phenyl??2??aryl??1 H??imidazo [1, 2??b] pyrazoles (5) by the cyclocondensation reactions between 5??amino??4??cyano??3??phenyl??1 H??pyrazole (1) and α?? bromoacetophenones (3) or α??tosyloxyacetophenones (2) obtained by the reactions of acetophenones with [hydroxy (tosyloxy) iodo] benzene (HTIB) have been synthesized in good yields, and the intermediates 5??amino??4??cyano??6??phenyl??1??(aroylmethyl) ...