Pyranopyrazoles. II. Synthesis and reactions of 1H, 6H??pyrano [2, 3??c] pyrazol??6??ones
MA Khan, AG Cosenza, GP Ellis
Index: Khan, Misbahul Ain; Cosenza, Alina Guerra; Ellis, Gwynn Pennant Journal of Heterocyclic Chemistry, 1982 , vol. 19, p. 1077 - 1085
Full Text: HTML
Citation Number: 25
Abstract
Abstract Various 1H, 6H-pyrano [2, 3-c] pyrazol-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 in these reactions and the preferred position of attack is the 5-position. The substitution products are formed by the addition-elimination ...
Related Articles:
[Tanaka, Teruo; Terada, Atsusuke; Miyadera, Tetsuo; Tachikawa, Ryuji Chemical and Pharmaceutical Bulletin, 1980 , vol. 28, # 1 p. 30 - 34]
[Tanaka, Teruo; Terada, Atsusuke; Miyadera, Tetsuo; Tachikawa, Ryuji Chemical and Pharmaceutical Bulletin, 1980 , vol. 28, # 1 p. 30 - 34]
Justus Liebig's Annalen Der Chemie. Über die Einwirkung des Ozons auf organische Verbindungen
[Stolle Chemische Berichte, 1905 , vol. 38, p. 3028 Show Details Knorr Justus Liebigs Annalen der Chemie, 1887 , vol. 238, p. 160,205 Justus Liebigs Annalen der Chemie, 1896 , vol. 293, p. 1,26, 41]