申请人:KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY
公开号:EP0550025A1
公开(公告)日:1993-07-07
The present invention relates to certain novel azasprio derivatives of following formula(I), which are especially useful as intermediates for the preparation of quinolone carboxylic acid derivatives posssessed with a broad spectrum of potent anti-bacterial activities; and the novel processes for preparing these intermediates.
wherein:
R₁ isa hydrogen atom, an optionally substituted C₁₋₂₀ alkyl, optionally substituted benzyl, or nitrogen protecting group;
R₂ isa hydrogen atom or a methyl group which is preferably substituted at the 4- or 6-position carbon;
R₃ is-CO₂H, -CON₃, -NCO, -CONHR₁₀ wherein R₁₀ is a hydrogen atom, a benzyl, C₁₋₈ alkyl, or C₁₋₅ alkoxycarbonyl group, or -(CH₂)mY wherein m is 0 or 1 and Y is a hydroxyl, C₂₋₅ acyloxy, mesyloxy, p-toluensulfonyloxy or amino group which is optionally substituted with one or two C₁₋₄ alkyl radicals, with one C₁₋₄ alkanoyl radical, with one benzoyl radical or with one nitrogen protecting radical metabolizable in vivo; and the carbon atom to which R₃ is attached is a chiral carbon atom which has the stereochemical configuration of (1,3)-R,S, (1,3)-R,R, (1,3)-S,S or (1,3)-S, R; and
n is1 or 2.
本发明涉及下式(I)的某些新型氮杂环丁烷衍生物,这些衍生物特别适用于制备具有广谱强效抗菌活性的喹诺酮羧酸衍生物的中间体;本发明还涉及制备这些中间体的新型工艺。
其中
R₁ 是氢原子、任选取代的 C₁₋₂₀ 烷基、任选取代的苄基或氮保护基团;
R₂ 是氢原子或甲基,甲基最好在 4 位或 6 位碳上被取代;
R₃是-CO₂H、-CON₃、-NCO、-CONHR₁₀,其中 R₁₀ 是氢原子、苄基、C₁₋₈烷基或 C₁₋₅烷氧基羰基,或-(CH₂)mY,其中 m 是 0 或 1,Y 是羟基、C₂₋₅ 酰氧基、间氧基、其中 m 为 0 或 1,Y 为羟基、酰氧基、间氧基、对甲苯磺酸氧基或氨基,可任选被一个或两个 C₁₋₄烷基、一个 C₁₋₄烷酰基、一个苯甲酰基或一个可在体内代谢的氮保护基取代;与 R₃ 连接的碳原子是手性碳原子,其立体化学构型为 (1,3)-R,S、(1,3)-R,R、(1,3)-S,S 或 (1,3)-S,R;以及
n 为 1 或 2。