A Simple One-Pot Synthesis of 2-Aryl-5-alkyl-Substituted Oxazoles by Cs2CO3-Mediated Reactions of Aromatic Primary Amides with 2,3-Dibromopropene
作者:Jayanta Ray、Nasima Yasmin
DOI:10.1055/s-0029-1217995
日期:2009.10
A simple and efficient method for the synthesis of 2-aryl-5-alkyl-substituted oxazoles has been developed. A series of 2,5-disubstituted oxazoles were synthesized in a single step by Cs2CO3-mediated reactions of aromatic primary amides with 2,3-dibromopropene.
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.
Base-Promoted Cycloisomerization for the Synthesis of Oxazoles and Imidazoles
A cesium carbonate promoted, transition metal and halogen‐free 5‐exo‐dig type cyclization reaction for the synthesis of oxazoles and imidazoles has been developed.
A facile one-pot synthesis of 2- o -cyanoaryl oxazole derivatives mediated by CuCN
作者:Senbao Fan、Tao Tong、Liting Fang、Jingyi Wu、Erfei Li、Honglan Kang、Xin Lv、Xiaoxia Wang
DOI:10.1016/j.tetlet.2018.02.058
日期:2018.4
approach to the synthesis of 2-o-cyanoaryl oxazole derivatives has been developed. Generally, the copper-mediated cyclization/coupling reactions afforded corresponding 2-cyanoaryl oxazoles and oxazolines in moderate to excellent yields. The functionalized oxazole derivatives may be useful in biological chemistry and medicinal science. Our investigation indicates that the formation of the oxazole ring might