Mono- and diquaternary salts of pyrimidylamino-cinnolines of trypanocidal activity are obtained from a pyrimidine substituted in the 2-, 4- (or 6-) position by amino- or lower alkylamino, by a halogen or thioether in another of these positions, and by, optionally, a lower alkyl, amino or lower alkylamino in the remaining one of these positions, and a cinnoline substituted in 4-position by amino, and optionally by further alkyl, either the pyrimidine compound or both being in the form of their quaternary salts, by heating the reagents together in presence of acid. The cinnoline compound may be employed in the form of a salt, or as a substance which will give rise to the amine under the conditions of reaction, such as an acyl derivative. In examples, pyrimidines substituted in the 4-position by chlorine, bromine or iodine, or by methylthio, in the 2-position by amino, methylamino, and isopropylamino, and in the 6-position by methyl, ethyl or amino, are made to react with 6-aminocinnolines, having in the 4-position, amino, acetylamino, methylamino, and a further methyl group, in the form of methiodide quaternary salt or a free amine. The pyrimidine compounds are used in the form of methiodide. The reaction takes place on heating with or without hydrochloric acid and the products are dimethiodides, methiodide - hydriodides, and monomethiodides or hydrates thereof, &c., and may be converted into other di- or mono-quaternary salts or hydrates by exchange or action of alkali. 4 : 6 - diamino - cinnoline 1 - methiodide is obtained by quaternating the 6-nitro-4-amino-cinnoline, followed by reducing with iron and hydrochloric acid, and the corresponding base by the reduction of 6-nitro-4-aminocinnoline. The base may be acetylated on the 6-amino group. The corresponding 6-amino-4-methyl-amino compound is obtained by the action of methylamine hydrochloride on 6-nitro-4-phenoxycinnoline, converting to the quaternary salt the 4-methylamino derivative obtained and reducing the product. The 6-amino-4-methyl-aminocinnoline base and the 3-methyl derivative are obtained by reduction of the 6-nitro compounds. 2 - Chloro - 4 - aminopyrimidine 1 - methiodide is obtained by quaternating the base. Specifications 634,471 and 663,096 are referred to.
通过在2、4(或6)位被
氨基或低级烷基
氨基取代的
嘧啶中,通过在另一个这些位置中的卤素或
硫醚,以及在剩余的这些位置中,选择性地通过低级烷基、
氨基或低级烷基
氨基,以及通过在4-位置上被
氨基取代的
茜素,制备具有抗锥虫活性的
嘧啶基
氨基
茜素的单、二季
铵盐,方法是在酸的存在下将试剂一起加热。
茜素化合物可以以盐的形式使用,或者作为在反应条件下会产生胺基的物质使用,例如酰基衍
生物。在实例中,通过将4-位置被
氯、
溴或
碘或甲
硫代取代,在2-位置被
氨基、甲基
氨基和异丙基
氨基取代,在6-位置被甲基、乙基或
氨基取代的
嘧啶与4-
氨基
茜素反应,其中4-位置还可以有乙酰
氨基、甲基
氨基和另一个甲基基团,以甲
碘季
铵盐或自由胺的形式存在。
嘧啶化合物以甲
碘季
铵盐的形式使用。反应在加热时进行,有或没有
盐酸存在,产物是二
碘化物、甲
碘化氢盐和单甲
碘化物或其
水合物,等等,可以通过交换或碱的作用转化为其他二季
铵盐或单季
铵盐或
水合物。通过对6-硝基-4-
氨基
茜素进行季
铵化,然后用
铁和
盐酸还原,可以得到4:6-二
氨基
茜素1-甲
碘化物,通过还原6-硝基-4-
氨基
茜素可以得到相应的碱。基团上的6-
氨基可以乙酰化。通过
甲胺盐酸盐作用于6-硝基-4-苯氧基
茜素,可以得到相应的4-甲基
氨基衍
生物,并还原产物。通过还原6-
硝基化合物可以得到6-
氨基-4-甲基
氨基
茜素基和3-甲基衍
生物。通过季
铵化基获得2-
氯-4-
氨基嘧啶1-甲
碘化物。参考规格书634,471和663,096。