Indazoles studies. 4. Thermolysis of 3-bromo-1-nitro-1H-indazoles in benzene and toluene. Formation of 1-phenyl-1H-indazoles

…, P Cohen-Fernandes, CL Habraken

Index: Zibuck, Regina; Stahl, Mark A.; Barchiesi, Bobbi; Waalwijk, Peter S.; Cohen-Fernandes, Pauline; Habraken, Clarisse L. Journal of Organic Chemistry, 1984 , vol. 49, # 18 p. 3310 - 3314

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Citation Number: 8

Abstract

Thermolysis of the 3-bromo-1-nitro-lH-indazoles 5a, b in refluxing benzene results in the evolution of bromine and NO2 affording the 3-bromo-1H-indazoles 6a, b, the dinitro-M- indazoles 2a, b, and the 1-phenyl-1H-indazoles 7a, b and 8a, b. In refluxing toluene only 6a, b and 2a, b are formed in addition to benzyl bromide. The structure assignments, particularly the assignment of the 1-position for the phenyl group in 7a, b and 8a, b, are based on 13C ...