IMAI KIN-ICHI; MANO MITSUHIKO; SEO TAKUJI; MATSUNO TOSHIMI, CHEM. AND PHARM. BULL., 1981, 29, NO 1, 88-97
作者:IMAI KIN-ICHI、 MANO MITSUHIKO、 SEO TAKUJI、 MATSUNO TOSHIMI
DOI:——
日期:——
Ambrogi; Cozzi; Sanjust, European Journal of Medicinal Chemistry, 1980, vol. 15, # 2, p. 157 - 163
作者:Ambrogi、Cozzi、Sanjust、et al.
DOI:——
日期:——
Anticoccidials. VI. An improved synthesis of 1,6-dihydro-6-oxo-2-pyrazinecarboxylic acid 4-oxide and some related derivatives and determination of anticoccidial activity.
1, 6-Dihydro-6-oxo-2-pyrazinecarboxylic acid 4-oxide (1) has been synthesized by two different methods. The first is a hydrolysis of methyl 6-chloro-2-pyrazinecarboxylate 4-oxide, which was in turn obtained from methyl 6-chloro-2-pyrazinecarboxylate by reaction with m-chloroperbenzoic acid. The second is an oxidation of 6-hydroxymethyl-2 (1H)-pyrazinone 4-oxide with nickel peroxide. Compound 1 was converted to amine salts, esters and amides. 6-Methoxy, 6-mercapto and 1-alkyl derivatives were also prepared. The compounds prepared were tested for anticoccidial activity in chickens against Eimeria tenella and marked activity was seen with compound 1 and amine salts of 1. The activity of 1 was counteracted by the simultaneous administration of an equal weight of orotic acid or adenine.