Microwave assisted solid support synthesis of novel 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazepines as potent antimicrobial agents.
An environmentally benign and economic synthesis of 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazepines is described from readily accessible substituted 2-mercapto-1-amino triazoles and substituted chalcones on basic alumina that are accelerated by exposure to microwaves. The reaction time has been brought down from hours to seconds with improved yield as compared to conventional heating. The method reported herein is devoid of the hazards of solution phase reactions. All the synthesised compounds were tested for their in vitro antibacterial and antifungal activity. Some compounds showed significant antimicrobial properties. The best activity was observed with compounds 3a, 3c, 4a and 4d.
Kidwai
M
M
Department of Chemistry, University of Delhi, India. mkidwai@del1.mantraonline.com
Sapra
P
P
Misra
P
P
Saxena
R K
RK
Singh
M
M
D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D000935:Antifungal Agents / Q000138:chemical synthesis / Q000494:pharmacology; D001230:Aspergillus / Q000187:drug effects; D001389:Azirines / Q000138:chemical synthesis / Q000494:pharmacology*; D001407:Bacillus / Q000187:drug effects; D020650:Combinatorial Chemistry Techniques; D004095:Dihydropyridines / Q000138:chemical synthesis / Q000494:pharmacology*; D006090:Gram-Negative Bacteria / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D008872:Microwaves; D013329:Structure-Activity Relationship; D014230:Triazoles / Q000138:chemical synthesis / Q000494:pharmacology*
D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D000935:Antifungal Agents; D001389:Azirines; D004095:Dihydropyridines; D014230:Triazoles; C069267:diazipine