申请人:Nissan Chemical Industries, Ltd.
公开号:US06555574B1
公开(公告)日:2003-04-29
This invention relates to a 4-oxybenzopyran derivative of formula (I) wherein, R1 and R2 represent each independently a hydrogen atom, a C1-6 alkyl group or a phenyl group; R3 represents a hydroxyl group or a C1-6 alkylcarbonyloxy group; R4 represents a hydrogen atom, a C3-6 cycloalkyl group, a C1-6 alkyl group, a C1-6 alkylcarbonyl group, a C1-6 alkylaminocarbonyl group, a di-C1-6 alkylaminocarbonyl group, an aryl group or a heteroaryl group; n represents an integer of 0-4; X represents —C(═O)NR7—, —NR8—, —NHC(═O)NH— or —S(O)2NH—; R5 represents a hydrogen atom or (a), (b), (c), (d), (e), (f), (g), (h), (i), (j), (k), or (l); R6 represents a hydrogen atom, a halogen atom, a nitro group or a cyano group; or a pharmaceutically acceptable salt thereof. And this invention also relates to an antiarrhythmic agent having the prolongation effect of the functional refractory period comprising said compound or a pharmaceutically acceptable salt thereof as an active ingredient.
该发明涉及式(I)的4-氧基苯并吡喃衍生物,其中,R1和R2分别独立表示氢原子、C1-6烷基或苯基;R3表示羟基或C1-6烷基羰氧基;R4表示氢原子、C3-6环烷基、C1-6烷基、C1-6烷基羰基、C1-6烷基氨基羰基、双C1-6烷基氨基羰基、芳基或杂环芳基;n表示0-4的整数;X表示—C(═O)NR7—、—NR8—、—NHC(═O)NH—或—S(O)2NH—;R5表示氢原子或(a)、(b)、(c)、(d)、(e)、(f)、(g)、(h)、(i)、(j)、(k)或(l);R6表示氢原子、卤原子、硝基或氰基;或其药学上可接受的盐。该发明还涉及一种具有功能性不应期延长作用的抗心律失常药物,其包括所述化合物或其药学上可接受的盐作为活性成分。