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Treatment of 3-aminopyrazoles (1a-e) with 3-ethoxymethylenpentane-2,4-dione afforded the new pyrazolo[1,5-a]pyrimidines (2a-e) which were then converted into the enamines (3a-e) by reaction with dimethylformamide dimethyl acetal; ring closure of these latter compounds led to pyrazolo[1,5-a]pyrido[3,4-e]pyrimidines (5a-e). © 1990.

A New Entry to Pyrazolo[1,5-a]pyrido[3,4-e]pyrimidine Derivatives / Bruni, F; Chimichi, S; Cosimelli, Barbara; Costanzo, A; Guerrini, G; Selleri, S.. - In: HETEROCYCLES. - ISSN 0385-5414. - 31:6(1990), pp. 1141-1149. [10.3987/com-90-5408]

A New Entry to Pyrazolo[1,5-a]pyrido[3,4-e]pyrimidine Derivatives.

COSIMELLI, BARBARA;
1990

Abstract

Treatment of 3-aminopyrazoles (1a-e) with 3-ethoxymethylenpentane-2,4-dione afforded the new pyrazolo[1,5-a]pyrimidines (2a-e) which were then converted into the enamines (3a-e) by reaction with dimethylformamide dimethyl acetal; ring closure of these latter compounds led to pyrazolo[1,5-a]pyrido[3,4-e]pyrimidines (5a-e). © 1990.
1990
HETEROCYCLES
A New Entry to Pyrazolo[1,5-a]pyrido[3,4-e]pyrimidine Derivatives / Bruni, F; Chimichi, S; Cosimelli, Barbara; Costanzo, A; Guerrini, G; Selleri, S.. - In: HETEROCYCLES. - ISSN 0385-5414. - 31:6(1990), pp. 1141-1149. [10.3987/com-90-5408]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/136925
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