申请人:Lonza AG
公开号:US05698704A1
公开(公告)日:1997-12-16
4-Oxoimidazolinium salts of the general formula: ##STR1## wherein R.sup.1 and R.sup.2 independently of one another are C.sub.1-10 -alkyl, C.sub.2-10 -alkenyl, C.sub.3-7 -cycloalkyl or optionally substituted aryl, arylalkyl, heteroaryl or heteroarylalkyl, or R.sup.1 and R.sup.2, together with the carbon atom to which they are bonded, form a three-membered to seven-membered saturated or unsaturated carbocyclic or heterocyclic ring, R.sup.3 is a C.sub.1-10 -alkyl group, C.sub.1-10 -alkenyl group, C.sub.3-7 -cycloalkyl group, aryl group, arylalkyl group or heteroaryl group, and A.sup.-- is an anion of a strong acid, are prepared by the cyclization of an .alpha.-acylaminonitrile in a nonaqueous solvent, in the presence of a lower alcohol and a strong acid. The compounds are intermediates for pharmaceutical active substances, for example, angiotensin II antagonists.
通用公式为:##STR1##其中R.sup.1和R.sup.2分别独立为C.sub.1-10-烷基,C.sub.2-10-烯基,C.sub.3-7-环烷基或可选择取代的芳基,芳基烷基,杂环芳基或杂环芳基烷基,或者R.sup.1和R.sup.2与它们结合的碳原子一起形成一个三元至七元的饱和或不饱和碳环或杂环,R.sup.3是C.sub.1-10-烷基,C.sub.1-10-烯基,C.sub.3-7-环烷基,芳基,芳基烷基或杂环芳基,而A.sup.--是强酸的阴离子,通过在非水溶剂中,在较低醇和强酸的存在下,环化α-酰胺基腈制备。这些化合物是制药活性物质的中间体,例如血管紧张素II拮抗剂。