The invention concerns a heterocyclic derivative of the formula I ##STR1## wherein Q is an optionally substituted quinoxalinyl or a hydrogenated derivative thereof X.sup.1 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 (1-6C)alkyl, (3-6C)alkenyl or (3-6C)alkynyl; 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.
该发明涉及一种公式I的杂环衍
生物
其中Q是一个可选择取代的
喹啉基或其氢化衍
生物,X^1是氧、
硫、亚砜、砜或
亚胺;Ar是苯基,可能带有一个或两个取代基,或者Ar是一个可选择取代的含有最多三个氮原子的6-成员杂环烷基;R^1是(1-6C)烷基、(3-6C)烯基或(3-6C)炔基;R^2和R^3一起形成一个公式--A^2--X^2--A^3--的基团,与A^2和A^3连接的碳原子一起定义一个具有4至7个环原子的环,其中A^2和A^3,可能相同也可能不同,每个是(1-4C)烷基,X^2是氧、
硫、亚砜、砜或
亚胺;或其药用盐。该发明的化合物是5-脂氧合酶酶的
抑制剂。