This invention relates to a compound of the formula:
wherein Q is nitrogen or CH; R1 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:
in which E is sulfur or NH; R2 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 salt thereof has excellent antibacterial activity and is used as antibiotics.
本发明涉及一种式如下的化合物:其中 Q 是氮或 CH;R1 是氢或可被取代的低级烷基;环 A 是
吡啶或
哒嗪环,该环在成环碳原子上被式如下的基团取代:其中 E 是
硫或 NH;R2 是
氨基、
氨基甲酰基
氨基、甲酰基
氨基、乙酰基
氨基、N-甲
酰亚胺基
氨基、N-乙
酰亚胺基
氨基、低级烷基
氨基、羟基或
氨基甲酰氧基;n 是 2 至 4 的整数。 本发明的化合物(I)或其药学上可接受的盐具有优异的抗菌活性,可用作抗生素。