New heterocyclic nitriles of the formula: ##STR1## wherein (i) Het represents a heterocyclic radical of aromatic character containing one or two nitrogen atoms selected from pyrid-3-yl, pyrid-4-yl, pyridazinyl, pyrazinyl, pyrimidinyl, quinolyl, imidazolyl, naphthyridinyl, quinoxalinyl and quinazolinyl, X represents an oxygen atom and Y represents a valency bond or a methylene radical, or altenatively X represents a sulphur atom and Y represents a sulphur atom, a valency bond or a methylene radical, or (ii) Het represents the pyrid-2-yl radical, X represents an oxygen atom and Y represents a valency bond or a methylene radical, or alternatively X represents a sulphur atom and Y represents a sulphur atom or a methylene radical, are useful, in particular, as intermediates for the preparation of therapeutically useful heterocyclic thioformamides by converting the depicted cyano radical into a grouping --CSNHR wherein R represents a hydrogen atom or an alkyl (C.sub.1-4) radical.
新的杂环腈的
化学式:##STR1##其中(i) Het代表含有一个或两个氮原子的芳香性质的杂环基团,选择自
吡啶-3-基、
吡啶-4-基、
吡啶嗪基、
吡嗪基、
嘧啶基、
喹啉基、
咪唑基、
萘啶基、喹
喹啉基和
喹啉基,X代表氧原子,Y代表一个价键或一个亚甲基基团,或者选择X代表
硫原子,Y代表
硫原子、一个价键或一个亚甲基基团,或(ii) Het代表
吡啶-2-基基团,X代表氧原子,Y代表一个价键或一个亚甲基基团,或者选择X代表
硫原子,Y代表
硫原子或一个亚甲基基团,这些杂环腈在特定情况下可作为制备具有治疗作用的杂环
硫代甲酰胺的中间体,通过将所示的
氰基转化为一个基团--CSNHR,其中R代表氢原子或烷基(C.sub.1-4)基团。