Synthesis and pharmacological evaluation of 4,4a-dihydro-5H-[1]benzopyrano[4,3-c]pyridazin-3(2H)-ones bioisosters of antihypertensive and antithrombotic benzo[h]cinnolinones
摘要:
A series of 4,4a-dihydro-5H-[1]benzopyrano[4,3-c]pyridazin-3-(2H)-ones (2a-h), have been prepared and evaluated for their pharmacological profile as antihypertensive and antithrombotic agents. Compounds 2 were ineffective in lowering the blood pressure of spontaneously hypertensive rats (SHR), only 2c (R1 = NHCOCH3) showing a short lasting action (< 2 h). Compounds 2c and 2b (R1 = NH2) were found to be very active as antithrombotic agents in mice, being more potent than acetylsalicylic acid (ASA) taken as reference drug. Moreover, many derivatives of this class protected rats from formation of ASA or phenylbutazone (PBZ) induced ulcers, the most active being 2f (R2 = OCH3) (ED50 = 12.2 mg/kg and 25.4 mg/kg po in ASA and PBZ models, respectively).
[EN] MACROLIDE ANTIBIOTICS<br/>[FR] ANTIBIOTIQUES A BASE DE MACROLIDES
申请人:GLAXO GROUP LTD
公开号:WO2002050091A1
公开(公告)日:2002-06-27
The present invention relates to 11,12 η lactone ketolides of formula (I) wherein R, R?1, R2, R3¿ are as defined herein and pharmaceutically acceptable salts and solvates thereof, to process for their preparation and their use in therapy or prophylaxis of systemic or topical bacterial infections in a human or animal body.
The present invention relates to 11,12 &ggr; lactone ketolides of formula (I) wherein R, R
1
, R
2
, R
3
are as defined herein and pharmaceutically acceptable salts and solvates thereof, to process for their preparation and their use in therapy or prophylaxis of systemic or topical bacterial infections in a human or animal body.
The present invention relates to 11,12 γ lactone ketolides of formula (I) wherein R, R
1
, R
2
, R
3
are as defined herein and pharmaceutically acceptable salts and solvates thereof, to process for their preparation and their use in therapy or prophylaxis of systemic or topical bacterial infections in a human or animal body.