Magnetic Resonance in Chemistry p. 1117 - 1121 (1992)
Update date:2022-07-30
Topics:
Chimichi, Stefano
Cosimelli, Barbara
Bruni, Fabrizio
Selleri, Silvia
The condensation of 3(5)-aminopyrazole and 5-amino-3-phenylpyrazole with ethyl 2,4-dioxopentanoate and 2-ethoxymethylidene-3-oxobutyrate has been re-investigated.Contrary to previous reports, the former reaction gives rise to both regioisomeric pyrazolo<1
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