Synthesis and antimosquito properties of 2,6-substituted benzo[d]thiazole and 2,4-substituted benzo[d]thiazole analogues against Anopheles arabiensis
作者:Katharigatta Narayanaswamy Venugopala、Manjula Krishnappa、Susanta K. Nayak、Bhat K. Subrahmanya、Jayashankaragowda P. Vaderapura、Raju K. Chalannavar、Raquel M. Gleiser、Bharti Odhav
DOI:10.1016/j.ejmech.2013.04.061
日期:2013.7
A novel and efficient one pot synthesis was developed for 2,6-substituted-benzo[d]thiazole analogues 4a -k and 2,4-substituted-benzo[d]thiazole analogues 41 p via three component condensation reaction of substituted arylaldehyde, 2-amino-6-halo/4-methyl-benzo[d]thiazole and 2-naphthol or 6-hydroxy quinoline in presence of 10% w/v NaCl in water by microwave method. This method enabled for short reaction times, easy work-up and significant high yields. The title compound 4b was used for single crystal X-ray studies in order to understand its conformation and packing features. The title compounds 4a p were screened for antimosquito properties such as repellency, insecticidal and larvicidal activity against Anopheles arabiensis by mosquito feeding-probing assay, cone bio-assay and standard WHO larvicidal assay, respectively. Among these analogous 4b, 4d and 4p exhibit the highest repellent activity comparable to the positive control DEET, and 4a and 4k knockdown most mosquitoes on repellent assays. (C) 2013 Elsevier Masson SAS. All rights reserved.
Design and green synthesis of 2-(diarylalkyl)aminobenzothiazole derivatives and their dual activities as angiotensin converting enzyme inhibitors and calcium channel blockers
作者:Praveen Kumar Kalavagunta、Pankaj K. Bagul、Anvesh Jallapally、Srinivas Kantevari、Sanjay K. Banerjee、Narender Ravirala
DOI:10.1016/j.ejmech.2014.06.035
日期:2014.8
2-(diarylalkyl)aminobenzothiazoles were designed based on commercial synthetic calcium channel blockers (CCBs) and angiotensinconvertingenzyme (ACE) inhibitors. Which are further modified based on the natural products which are angiotensinconvertingenzyme (ACE) inhibitors. Completely green protocol was developed for their synthesis. As they are initially designed based on CCBs, they were screened for