Novel 3, 3a, 4, 5, 6, 7-Hexahydroindazole and Arylthiazolylpyrazoline derivatives as Anti-inflammatory Agents
A novel series of 7‐benzylidene‐3, 3a, 4, 5, 6, 7‐hexahydro‐3‐phenyl‐2H‐indazole substituted at the 2‐position were synthesized. The reaction of 2, 6‐bis‐benzylidenecyclohexanone (1) with thiosemicarbazide in the presence of NaOH afforded a mixture of the 3‐H, 3a‐H trans 2 and cis 2a diastereoisomer...
Saved in:
Published in | Archiv der Pharmazie (Weinheim) Vol. 336; no. 12; pp. 551 - 559 |
---|---|
Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
01.12.2003
WILEY‐VCH Verlag Wiley-VCH |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | A novel series of 7‐benzylidene‐3, 3a, 4, 5, 6, 7‐hexahydro‐3‐phenyl‐2H‐indazole substituted at the 2‐position were synthesized. The reaction of 2, 6‐bis‐benzylidenecyclohexanone (1) with thiosemicarbazide in the presence of NaOH afforded a mixture of the 3‐H, 3a‐H trans 2 and cis 2a diastereoisomers which have been separated by fractional recrystallization. Interaction of the first intermediate 2 with substituted phenacyl bromides, aromatic aldehydes and chloroacetic acid in presence of a mixture of acetic acid and acetic anhydride, and 2, 3‐dichloroquinoxaline yielded the corresponding 7‐benzylidene‐3, 3a, 4, 5, 6, 7‐hexahydro‐3‐phenyl‐2H‐indazole derivatives substituted at the 2‐position with 4‐aryl‐2‐thiazolyl 3a, b, 5‐arylidene‐4, 5‐dihydro‐4‐oxo‐2‐thiazolyl 4a, b and thiazolo[4, 5‐b]quinoxalin‐2‐yl 5, respectively. Moreover, the other intermediates 3, 5‐diaryl‐1‐thiocarbamoyl‐2‐pyrazolines 7a—d were reacted with the previously‐mentioned reagents and gave the corresponding 3, 5‐diaryl‐1‐(4‐aryl‐2‐thiazolyl)‐2‐pyrazolines 8a—h, 3, 5‐diaryl‐1‐(5‐arylidene‐4, 5‐dihydro‐4‐oxo‐2‐thiazolyl)‐2‐pyrazolines 9a—d and 3, 5‐diaryl‐1‐(thiazolo[4, 5‐b]quinoxalin‐2‐yl)‐2‐pyrazoline derivatives 10a, b, respectively. Some of the newly prepared compounds were subjected to evaluation for their anti‐inflammatory activity. The structures of the new compounds were confirmed by elemental analyses as well as 1H‐NMR, IR, and MS data. |
---|---|
Bibliography: | ark:/67375/WNG-BPBVP8LG-W istex:765E0CB53B8E4B01DA5A076F9711CD1AC748603D ArticleID:ARDP200300796 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0365-6233 1521-4184 |
DOI: | 10.1002/ardp.200300796 |