Highly Efficient One-Pot Synthesis of 2-Aminobenzoxazoles Using Triflic Acid as a Cyclodesulfurizing Reagent
摘要:
An efficient one-pot synthetic strategy for 2-aminobenzoxazoles was developed from isothiocyanates and 2-aminophenol using triflic acid as a cyclodesulfurizing reagent.
Substituted 2-anilinobenzoxazoles used as immunosuppressive agents
申请人:Eli Lilly and Company
公开号:US04088770A1
公开(公告)日:1978-05-09
Compositions comprising certain 2-(substituted anilino)benzoxazoles, such as 2-[4-bromo-3-(trifluoromethyl)anilino]benzoxazole, and methods for using same as immunosuppressive agents, antifertility agents, for the prophylaxis of Marek's disease in chickens and as herbicides.
Compositions comprising certain 2-(substituted anilino)benzoxazoles, such as 2-[4-bromo-3-(trifluoromethyl)-anilino]benzoxazole, and methods for using same as immunosuppressive agents, antifertility agents, for the prophylaxis of Marek's disease in chickens and as herbicides.
Visible-light-promoted cyclodesulfurization of phenolic thioureas: an organophotoredox catalytic approach to 2-aminobenzoxazoles
作者:Vinod K. Yadav、Vishnu P. Srivastava、Lal Dhar S. Yadav
DOI:10.1016/j.tetlet.2015.11.089
日期:2016.1
A facile and efficient one-pot operation for the photo-oxidative cyclodesulfurization of o-phenolic thioureas to afford 2-aminobenzoxazoles is reported. The protocol could be executed under visible light irradiation employing eosin Y as an organophotoredox catalyst and offers a superior alternative to the existing methods of the cyclodesulfurization of phenolic thioureas. The salient features of the present metal-free approach are the utilization of air and visible light as the greenest and sustainable reagents under mild conditions. (C) 2015 Elsevier Ltd. All rights reserved.