74169-53-2Relevant articles and documents
Pyranopyrazoles. II (1). Synthesis and Reactions of 1H,6H-Pyranopyrazol-6-ones
Khan, Misbahul Ain,Cosenza, Alina Guerra,Ellis, Gwynn Pennant
, p. 1077 - 1085 (2007/10/02)
Various 1H,6H-pyranopyrazol-6-ones (III-XXIII) were obtained from β-keto esters and 1H-pyrazol-5-ones or hydrazines.Nitrations, chlorinations and brominations of these pyranopyrazoles were also carried out giving the corresponding derivatives (XXIV-LXIV).The pyrone ring is the more reactive one by the addition-elimination route.