Derivatives of 4,5-dihydro-4-oxofuran-2-carboxylic acid, especially for use as hypolipidemic agents, processes for their preparation, pharmaceutical compositions comprising them, tetrahydropyran-2,3,5-triones useful in the preparation of the said derivatives and a process for preparing these tetrahydropyran-2,3,5-triones
申请人:AMERICAN HOME PRODUCTS CORPORATION
公开号:EP0006305A1
公开(公告)日:1980-01-09
Compounds of formula I
in which R1 and R2 each is lower alkyl, cyclo(lower)alkyl, lower alkoxy(lower)alkylene, phenyl or phenyl mono- or disubstituted with lower alkyl, lower alkoxy, halo, nitro or trifluoromethyl; or RI and R2 together form a -(CH2)m-X-(CH2)n- chain wherein m and n each is an integer from one to four and X is methylene, oxa or thia; or R1 and R2 together with the carbon atom to which they are joined form a spiro-[1,2,3,4-tetrahydronaphthalene]-1 or spiro[indan]-1 radical; R3 is hydrogen or lower alkyl; and R' is hydrogen, lower alkyl, cyclo(lower)alkyl, phenyl(lower)alkylene, amino-(lower)alkylene, lower alkylamino(lower)alkylene, di(lower alkyl)amino(lower)alkylene or 3-pyridinyl(lower)alkylene, or a therapeutically acceptable addition salt thereof are disclosed which possess hypolipidemic activity, and can be used in pharmaceutical compositions.
The compounds of formula I may be prepared by cyclising a corresponding compound of formula X
and if desired esterifying. Tetrahydropyran-2,3,5-trione intermediates are also disclosed.
式 I 的化合物
其中 R1 和 R2 各自为低级烷基、环(低级)烷基、低级烷氧基(低级)亚烷基、苯基或与低级烷基、低级烷氧基、卤代、硝基或三氟甲基单取代或二取代的苯基;或 RI 和 R2 共同形成-(CH2)m-X-(CH2)n-链,其中 m 和 n 均为 1 至 4 的整数,X 为亚甲基、氧杂环丁烷或硫杂环丁烷;或 R1 和 R2 与它们连接的碳原子共同形成螺-[1,2,3,4-四氢萘]-1 或螺[茚]-1 自由基;R3是氢或低级烷基;R'是氢、低级烷基、环(低级)烷基、苯基(低级)亚烷基、氨基(低级)亚烷基、低级烷基氨基(低级)亚烷基、二(低级烷基)氨基(低级)亚烷基或 3-吡啶基(低级)亚烷基,或其治疗上可接受的加成盐,这些化合物具有降血脂活性,可用于药物组合物中。
式 I 化合物可通过环化相应的式 X 化合物
并根据需要进行酯化。此外,还公开了四氢吡喃-2,3,5-三酮中间体。