The invention concerns a heterocycle of the formula I ##STR1## wherein Q is an optionally substituted 6-membered monocyclic or 10-membered bicyclic heterocyclic moiety containing one or two nitrogen atoms; A is (1-6C)alkylene, (3-6C)alkenylene, (3-6C)alkynylene or cyclo(3-6C)alkylene; X is oxy, thio, sulphinyl, sulphonyl or imino; Ar is phenylene which may optionally bear one or two substituents or Ar is an optionally substituted 6-membered heterocyclene moiety containing up to three nitrogen atoms; R.sup.1 is hydrogen, (1-6C)alkyl, (3-6C)alkenyl, (3-6C)alkynyl, cyano-(1-4C)alkyl or (2-4C)alkanoyl, or optionally substituted benzoyl; and R.sup.2 and R.sup.3 together form a group of the formula --A.sup.2 --X.sup.2 --A.sup.3 -- which, together with the carbon atom to which A.sup.2 and A.sup.3 are attached, defines a ring having 4 to 7 ring atoms, wherein A.sup.2 and A.sup.3, which may be the same or different, each is (1-4C)alkylene and X.sup.2 is oxy, thio, sulphinyl, sulphonyl or imino; or a pharmaceutically-acceptable salt thereof. The compounds of the invention are inhibitors of the enzyme 5-lipoxygenase.
该发明涉及公式I的
杂环化合物:##STR1##
其中,Q是含有一个或两个氮原子的可选取代的6元单环或10元二环杂环基;A是(1-6C)烷基,(3-6C)烯基,(3-6C)炔基或cyclo(3-6C)烷基;X是氧,
硫,亚磺酰基,磺酰基或
亚胺基;Ar是苯基,可以选择带有一个或两个取代基,或者Ar是可选取代的含有最多三个氮原子的6元杂环基;R.sup.1是氢,(1-6C)烷基,(3-6C)烯基,(3-6C)炔基,
氰基-(1-4C)烷基或(2-4C)烷酰基,或者是可选取代的苯甲酰基;R.sup.2和R.sup.3共同形成一个式子--A.sup.2 --X.sup.2 --A.sup.3 --的基团,与A.sup.2和A.sup.3连接的碳原子一起定义具有4至7个环原子的环,其中A.sup.2和A.sup.3,可以相同也可以不同,每个都是(1-4C)烷基,X.sup.2是氧,
硫,亚磺酰基,磺酰基或
亚胺基;或其药学上可接受的盐。该发明的化合物是5-脂氧合酶酶的
抑制剂。