Copper-Catalyzed Electrophilic Amination of Benzoxazoles via Magnesation
作者:Sangback Lee、Yunmi Lee
DOI:10.1002/ejoc.201900335
日期:2019.5.26
A mild and efficient method for the synthesis of 2‐aminobenzoxazoles through a Cu‐catalyzed electrophilicamination of benzoxazole derivatives with O‐benzoyl hydroxylamines by direct magnesation has been developed.
Preparation of derivatives of 1-(2-pyrimidinyl)piperazine as potential antianxiety, antidepressant, and antipsychotic agents
作者:Irwin Becker
DOI:10.1002/jhet.5570450410
日期:2008.7
This paper describes the preparation of twenty-eight derivatives of 1-(2-pyrimidinyl)piperazine as potential antianxiety, antidepressant, and antipsychotic agents. In twenty-six of the preparations a chloro nitrogen heterocycle was caused to react with an excess of 1-(2-pyrimidinyl)piperazine in the absence of solvent. A specific example is given above.
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
A green approach for the synthesis of 2-amino azoles by the reaction of 2-chloro azoles with various types of amines using water as an environment friendly solvent at room temperature has been developed. The significant features of this methodology are short reaction time and easy product separation. This approach provides various biologically active compounds in good to excellent yields without adding any catalyst, ligand, or base. (C) 2015 Elsevier Ltd. All rights reserved.
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.