Novel substituted quinolones of the formula:
where Het represents a heterobicyclic group having a 6-membered ring fused to a further 5- or 6-membered ring, containing 1 to 3 N-atoms in the non-fused positions, R is H or alkyl, and R¹ and R² are each H or alkyl, are force-selective cardiac stimulants.
式中的新型取代喹诺酮类化合物:
其中 Het 代表一个杂双环基团,该基团具有一个与另一个 5 或 6 元环融合的 6 元环,在非融合位置上含有 1 至 3 个 N 原子,R 是 H 或烷基,R¹ 和 R² 分别是 H 或烷基。
A series of novel heterobicyclic substituted 2-(1H)-quinolone compounds have been prepared, including the 3,4-dihydro derivatives thereof, wherein the heterobicyclic ring moiety is an optionally-substituted indolyl, phthalizinyl, benzimidazolyl, imidazopyridinyl, quinolinyl or isoquinolinyl group attached by an nitrogen or carbon atom of said group to the 6-position of the quinolone ring. The optional substituent is a C.sub.1 -C.sub.14 alkyl group located on either of the two heterobicyclic rings and/or an oxo group situated on the heterocyclic portion of said heterobicyclic ring system. These particular compounds are useful in therapy as cardiac stimulants and therefore, are of value in the treatment of various cardiac conditions. 6-1(H)-Imidazo[4,5-b]pyridin-6-yl}-8-methyl-2-(1H)-quinolone represents a typical and preferred member compound. Methods for preparing these compounds from known starting materials are provided.