Silver-Catalyzed Preparation of Oxazolines from <i>N</i>-Propargylamides
作者:Michael Harmata、Chaofeng Huang
DOI:10.1055/s-2008-1078405
日期:2008.5
Treatment of N-propargylamides with 5 mol% of silver hexafluoroantimonate results in the rapid formation of oxazolines in essentially quantitative yield.
Facile, Selective, and Regiocontrolled Synthesis of Oxazolines and Oxazoles Mediated by ZnI<sub>2</sub> and FeCl<sub>3</sub>
作者:Gopal Chandru Senadi、Wan-Ping Hu、Jia-Shing Hsiao、Jaya Kishore Vandavasi、Chung-Yu Chen、Jeh-Jeng Wang
DOI:10.1021/ol301980g
日期:2012.9.7
An expedient method for a direct approach to the selective and regiocontrolled synthesis of 2-oxazolines and 2-oxazoles mediated by ZnI2 and FeCl3 is described. A Lewis acid promoted cyclization of acetylenic amide with various functionalities was well tolerated to give 2-oxazolines and 2-oxazoles in good to excellent yields under mild reaction conditions.