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.
作者:KINICHI IMAI、MITSUHIKO MANO、TAKUJI SEO、TOSHIMI MATSUNO
DOI:10.1248/cpb.29.88
日期:——
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.
1, 6-二氢-6-氧-2-吡嗪甲酸4-氧化物(1)通过两种不同的方法合成。第一种是水解6-氯-2-吡嗪甲酸甲酯4-氧化物,该化合物又是通过与对氯过苯甲酸反应得到的6-氯-2-吡嗪甲酸甲酯。第二种是用过氧化镍氧化6-羟基甲基-2(1H)-吡嗪酮4-氧化物。化合物1被转化为胺盐、酯和酰胺。同时还制备了6-甲氧基、6-巯基和1-烷基衍生物。制备的化合物在鸡体内针对小球虫(Eimeria tenella)进行了抗球虫活性测试,发现化合物1及其胺盐具有显著活性。化合物1的活性被同时给予等重量的啤酒酸或腺嘌呤所抵消。