Efficient and Novel Synthesis of Benzoxazole Derivatives in the Presence of Zinc Dust Under Solvent-Free Conditions
作者:M. S. R. Murty、Kesur R. Ram、Rayudu Venkateswara Rao、J. S. Yadav
DOI:10.1080/00397910903320621
日期:2010.8.31
A mild and efficient method has been developed for the synthesis of 2-cyclic amine-substituted benzoxazole derivatives using zinc dust under microwave irradiation in the absence of solvent is described. A comparative study was performed under conventional and microwave heating conditions. Zinc dust can be reused several times after reactivation. The significant feature of this method is the isolation
CsF–Celite catalyzed facile N-alkylation of 2(3H)-benzoxazolones and antimicrobial properties of 2-substituted benzoxazole and 3-substituted-2(3H)-benzoxazolone derivatives
作者:M. S. R. Murty、Kesur R. Ram、Rayudu Venkateswara Rao、J. S. Yadav、U. S. N. Murty、K. Pranay Kumar
DOI:10.1007/s00044-010-9367-5
日期:2011.6
The synthesis and antimicrobial activity studies of a new series of cyclic amine containing benzoxazoles and benzoxazolone-2(3H)-ones derivatives were described. The alkylation of benzoxazolone was carried out using cesium fluoride-Celite. The newly synthesized compounds with the influence of the induction of the cyclic amine moiety in the benzoxazole scaffold have been evaluated with respect to the antibacterial and antifungal activity. The 2-cyclic amine-1,3-benzoxazoles (5a-l), 5-chloro-3-alkyl substituted-1,3-benzoxazol-2(3H)-ones (8a-f), and 3-[3-(cyclic amine)propyl]-1,3-benzoxazol-2(3H)-ones (9a-f) were synthesized. These derivatives were tested for antibacterial and antifungal activity. Among the compounds tested, 8c and 9f showed moderate to good antibacterial and antifungal activity. Compound 8a showed good antifungal activity.