This article describes an efficient method of bromination of organicsubstrates including aromatics, alkenes and alkynes with NH4VO3 as a catalyst and H2O2 as an oxidant agent using a non-toxic and easy-to-handle source of bromine, tetrabutylammonium bromide. The process was developed under mild reaction conditions and is an innovation from reported methods in aspects such as: i) short reaction times
本文介绍了一种有效的方法,该方法使用无毒且易于处理的溴,四丁基铵源,以NH 4 VO 3为催化剂,H 2 O 2为氧化剂,对包括芳族化合物,烯烃和炔烃在内的有机底物进行溴化。溴化物。该方法是在温和的反应条件下开发的,并且是从已报道方法的创新,例如:i)反应时间短,ii)在室温下工作的能力,iii)区域选择性和高产率。
A Domino Copper-Catalyzed C-N and C-O Cross-Coupling for the Conversion of Primary Amides into Oxazoles
作者:Frank Glorius、Kerstin Schuh (née Müller)
DOI:10.1055/s-2007-983782
日期:2007.7
A variety of oxazoles can efficiently be prepared, in a single step and in good yield, from primaryamides and 1,2-dihaloalkenes using copper-catalysis. This new method allows the re-gioselective formation of a range of substituted oxazoles. The required 1,2-dihaloalkenes can prepared by simple treatment of alkynes with elemental bromine or iodine.