95419-63-9Relevant academic research and scientific papers
COPPER(II) IN ORGANIC SYNTHESIS. III. REACTION OF COPPER(II) COMPLEXES OF o-QUINONE MONOPHENYLHYDRAZONES WITH DIMETHYL ACETYLENEDICARBOXYLATE
Bisiacchi, Piero,Coda, Andreina Corsico,Desimoni, Giovanni,Righetti, Pier Paolo,Tacconi, Gianfranco
, p. 119 - 124 (2007/10/02)
Bis-copper(II) complexes of o-quinone monophenylhydrazones (2a-e) react with dimethyl acetylenedicarboxylate.Probably through a Michael reaction followed by intramolecular cyclization, o-benzoquinone derivatives 2a,b give indazoles 5a,b, also synthesized by a new route from isatines.Naphtho- and phenanthroquinone derivatives 2c-e are oxidized by copper(II) ions to ketocarbenes which undergo 1,3-dipolar cycloaddition to benzofuran derivatives 11c-e.
