申请人:Teijin Limited
公开号:US04421914A1
公开(公告)日:1983-12-20
A compound selected from thiazolo[3,2-a]pyrimidines or their enolate derivatives represented by the following general formula ##STR1## wherein R.sup.1 and R.sup.2 are identical or different, and each represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 3 to 10 carbon atoms, a substituted or unsubstituted phenyl group, a substituted or unsubstituted cycloaliphatic group having 3 to 8 carbon atoms, a substituted or unsubstituted phenylalkyl group or a substituted or unsubstituted acyl group having 2 to 7 carbon atoms, provided that R.sup.1 and R.sup.2 are not simultaneously hydrogen atoms or substituted or unsubstituted acyl groups having 2 to 7 carbon atoms; and R.sup.1 and R.sup.2, when taken together, may form, with the nitrogen atom to which they are bonded, a 5- or 6-membered ring which may further contain one or more hetero atoms; and acid addition salts of these compounds. The thiazolo[3,2-a]pyrimidines may be prepared by a process comprising (a) reacting a malonic acid derivative of the following general formula ##STR2## wherein R.sup.1 and R.sup.2 are as defined with regard to formula (I), and R.sup.4 and R.sup.5 are identical or different and each represents an alkyl group having 1 to 6 carbon atoms, with 2-aminothiazoline under heat, if desired in the presence of an inert organic solvent, to induce cyclocondensation, or (b) performing said condensation reaction in the presence of an alkali metal alkoxide, if desired in the presence of an inert organic solvent, and neutralizing the resulting enolate with an acid; and if desired, reacting the reaction product of (a) or (b) with an acid. The present invention provides also several processes for preparing enolate derivatives thereof. The thiazolo[3,2-a]pyrimidines, their enolate derivatives and acid addition compounds thereof are useful for regulating the immune function of a warm-blooded animal.
从噻唑[3,2-a]嘧啶或其烯醇衍生物中选择的一种化合物,其由以下一般式表示##STR1##其中R.sup.1和R.sup.2相同或不同,每个代表氢原子、具有1至10个碳原子的烷基基团、具有3至10个碳原子的烯基基团、取代或未取代的苯基团、取代或未取代的具有3至8个碳原子的环脂基团、取代或未取代的苯基烷基基团或取代或未取代的具有2至7个碳原子的酰基基团,前提是R.sup.1和R.sup.2不同时为氢原子或取代或未取代的具有2至7个碳原子的酰基基团;当一起取时,R.sup.1和R.sup.2可以与它们结合的氮原子形成一个5-或6-成员环,该环可能进一步包含一个或多个杂原子;以及这些化合物的酸盐。噻唑[3,2-a]嘧啶可以通过以下过程制备:(a)在热下,如有必要,在惰性有机溶剂的存在下,将具有以下一般式的马来酸衍生物与2-氨基噻唑啉反应,以诱导环缩合,或者(b)在碱金属烷氧化物的存在下进行所述缩合反应,如有必要,在惰性有机溶剂的存在下,并用酸中和所得的烯醇;如有必要,将(a)或(b)的反应产物与酸反应。本发明还提供了几种制备其烯醇衍生物的方法。噻唑[3,2-a]嘧啶、其烯醇衍生物和酸盐化合物对调节温血动物的免疫功能有用。