The novel 5-oxo-5H-hexahydrofuro [3,2-b] pyrrole derivatives of formula (I):
wherein:
A is CH-and n is 1 to 6; or
A is C=CH- and n is 0 to 5; or
A is CH-CH=CH- and n is 0 to 4; and
R1 is hydrogen or C1-6alkyl;
R2 is hydrogen or C1-6alkyl; and
R3 is C4-9alkyl, C5-7cycloalkyl or C5-7cycloalkyl-C1-6alkyl; e.g. 2-(4'-ethoxycarbonyl-n-butyl)-4-(3' '-hydroxy-3' '-methyl-n-nonyl)- 5-oxo-5H-hexahydrofuro [3,2-b] pyrrole, and salts thereof, have antiplatelet aggregation and bronchodilation activity. They can be prepared by (I) demercuration, (II) dehydrohalogenation or (III) oxidation of a compound of formula (VI):
wherein R R2 and R3 are as defined above, p is 0 to 5 and X is (I) a mecuri salt, (II) halo or (III) phenyl selenyl respectively. The preparation of the compounds of formula (VI) is described.
式(I)的新型 5-
氧代-5H-六
氢呋喃[3,2-b]
吡咯衍
生物:
其中
A 是 CH,n 是 1 至 6;或
A 是 C=CH-,n 是 0 至 5;或
A 是 CH-CH=CH-,n 是 0 至 4;以及
R1 是
氢或 C1-6 烷基;
R2 是
氢或 C1-6 烷基;以及
R3是C4-9烷基、C5-7
环烷基或C5-7
环烷基-C1-6烷基;例如,2-(4'-乙
氧羰基-正丁基)-4-(3''-羟基-3''-
甲基-壬基)-5-
氧代-5H-六
氢呋喃并[3,2-b]
吡咯及其盐类具有抗血小板聚集和支气管扩张活性。它们可以通过(I)
脱氢、(II)
脱氢卤化或(III)式(VI)化合物
氧化制备:
其中 R R2 和 R3 如上定义,p 为 0 至 5,X 分别为(I)梅库里盐、(II)卤代或(III)
苯基
硒基。描述了式 (VI) 化合物的制备方法。