Dihydronaphthyridine derivatives, their preparation and compositions containing them
申请人:SANKYO COMPANY LIMITED
公开号:EP0094245A2
公开(公告)日:1983-11-16
Compounds of formula (I)
(wherein R1 represents a hydrogen atom or an alkyl or acyl group, R2 represents an alkyl group and R3 represents a hydrogen or halogen atom or an alkyl, hydroxy, alkoxy, aryloxy, optionally substituted pyridyloxy, alkylthio, arylthio, amino or mono- or di-substituted amino group) and pharmaceutically acceptable acid addition salts thereof have useful analgesic and anti-inflammatory properties. They may be prepared by condensing a 5-amino-2-(R3)pyridine with a ketone of formula R2COCH3, or with a condensation product of said ketone, to give a compound of formula (1) in which R1 represents a hydrogen atom and then, if desired, alkylating or acylating that compound.
A lubricant composition includes a base oil present in an amount of greater than 70 parts by weight per 100 parts by weight of the lubricant composition and an antioxidant. The antioxidant has the structure: wherein each X is independently C-A or N, so long as at least one X is N but no more than two of X are N. Moreover, A is H, cyano or an electron donating group that: (1) has an atom having at least one lone pair of electrons that is bonded directly to the aromatic ring; or (2) is an aryl group or alkyl group. Further, each R is independently H, an alkyl group, or aryl group and each R′ is independently an alkyl group or an aryl group.
一种润滑油组合物包括一种基础油(以每 100 份润滑油组合物的重量计,其含量大于 70 份)和一种抗氧化剂。抗氧化剂具有以下结构: 其中每个 X 独立地为 C-A 或 N,只要至少一个 X 为 N,但不超过两个 X 为 N:(1) 具有至少一个孤对电子的原子直接与芳香环键合;或 (2) 芳基或烷基。此外,每个 R 独立地为 H、烷基或芳基,每个 R′独立地为烷基或芳基。