申请人:Takeda Chemical Industries, Ltd.
公开号:US04921851A1
公开(公告)日:1990-05-01
This invention relates to a compound of the formula: ##STR1## wherein Q is nitrogen or CH; R.sup.1 is hydrogen or a lower alkyl group which may be substituted; and ring A is a pyridine or pyridazine ring which is substituted at the ring-constituting carbon atom by a group of the formula: --E--(CH.sub.2).sub.n --R.sup.2 in which E is sulfur or NH; R.sup.2 is an amino, carbamoylamino, formylamino, acetylamino, N-formimidoylamino, N-acetimidoylamino, lower alkylamino, hydroxyl or carbamoyloxy group; and n is an integer of 2 to 4, or a pharmaceutically acceptable salt thereof. The compound (I) or a pharmaceutically acceptable sale thereof has excellent antibacterial activity and is used as antibiotics.
本发明涉及一种具有以下结构的化合物:其中Q为氮或CH;R.sup.1为氢或可被取代的较低烷基基团;环A为在环构成碳原子上被以下式的基团取代的吡啶或吡啶嗪环:--E--(CH.sub.2).sub.n --R.sup.2,在其中E为硫或NH;R.sup.2为氨基、氨基甲酰胺、甲酰胺基、乙酰胺基、N-甲酰胺基、N-乙酰胺基、较低烷基氨基、羟基或羰基氧基团;n为2至4的整数,或其药学上可接受的盐。该化合物(I)或其药学上可接受的盐具有出色的抗菌活性,可用作抗生素。