Interestingly, the ester derivatives 7c, 7f, and 7h eliminated affinity for the 5-HT3receptors. These unusual structure-activity relationships and the deviation of the 3-carbonyl moiety from the plane of an aromatic ring suggest that the active conformation of 7a might be different from the proposed one for the preceding 5-HT3antagonists. Thus, 6f was chosen for further studies. No receptor binding for a variety
imidazol[4,5-c][1,8]naphthyridin-4(5H)-ones 5 were designed and synthesized. Some of these new heterocycles exhibited more potent bronchodilator activity in vitro and in vivo than theophylline. With respect to modification at the 5-position, both phenyl and n-butyl substitution produced potent activity. Though bulk tolerance at N-3 is observed with short and small lipophilic groups, any substitution at the
Antiemetic and migraine suppressing heterocyclic compounds and pharmaceutical compositions containing them
申请人:KYOWA HAKKO KOGYO CO., LTD
公开号:EP0458636A1
公开(公告)日:1991-11-27
Antiemetic and migraine suppressant compounds are disclosed being heterocyclic compounds of the
wherein R¹ represents hydrogen, C₁-C₆ alkyl or C₆ - C₁₀; R² represents hydrogen, hydroxyl or C₁ - C₆ alkyl; A represents CH or N; X represents -O- or -NH-; R³ represents hydrogen, hydroxyl or C₁-C₆ alkyl; R⁴ represents C₁-C₆ alkyl; and n represents 0 or 1, and their pharmaceutically acceptable salts.
Certain 2-oxo-quinoline carboxylates or corresponding carboxamides
申请人:Kyowa Hakko Kogyo Co., Ltd.
公开号:US05248684A1
公开(公告)日:1993-09-28
There is disclosed a heterocyclic compound represented by general formula: ##STR1## wherein R.sup.1 represents hydrogen, lower alkyl or aryl; R.sup.2 represents hydrogen, hydroxyl or lower alkyl; A represents CH or N; X represents --O-- or --NH--; R.sup.3 represents hydrogen, hydroxyl or lower alkyl; R.sup.4 represents lower alkyl; represents 0 or 1, or a pharmaceutically acceptable salt thereof.