Novel synthesis of indazoles from (η 6-arene) tricarbonylchromium complexes

…, SG Davies, MT Duarte, C Resende, FC Teixeira

Index: Da Costa, M. Rute G.; Curto, M. Joao M.; Davies, Stephen G.; Duarte, M. Teresa; Resende; Teixeira, Fatima C. Journal of Organometallic Chemistry, 2000 , vol. 604, # 2 p. 157 - 169

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Citation Number: 14

Abstract

Indazole chromium complexes and some of its derivatives were synthesised by two strategies:(1) by cyclisation of [η6-2-(2′-phenylhydrazine)-1, 3-dioxolane] tricarbonylchromium (2) in acidic conditions which was converted into σ-complex (11);(2) by thermolysis of Cr (CO) 6 with 1-bis (trimethylsilyl) methylindazole (3) and 2-bis (trimethylsilyl) methyl-3-trimethyl-silylindazole (4), using bulky protecting groups at N (1) or ...