Microwave-assisted, Mo(CO)6-mediated, palladium-catalyzed amino-carbonylation of aryl halides using allylamine: from exploration to scale-up
作者:Prasad Appukkuttan、Linda Axelsson、Erik Van der Eycken、Mats Larhed
DOI:10.1016/j.tetlet.2008.07.053
日期:2008.9
Palladium-catalyzed aminocarbonylations of various (hetero)aryl halides with allylamine usingMo(CO)6 as a solid, in situ CO source, were explored. Microwave-enhanced conditions proved to be highly useful in promoting the conversions in a mere 10–20 min with various (hetero)aryliodides, bromides and chlorides. The scale-up of a microwave-enhanced aminocarbonylation to 25 mmol scale was performed successfully
Convenient synthesis of furan-3-carboxylic acid and derivatives
作者:Nilo Zanatta、Débora Faoro、Simone C. Silva、Helio G. Bonacorso、Marcos A.P. Martins
DOI:10.1016/j.tetlet.2004.05.109
日期:2004.7
A convenient synthesis of furan-3-carboxylic acid and derivatives from aromatization of 4-trichloroacetyl-2,3-dihydrofuran followed by nucleophilicdisplacement of the trichloromethyl group by hydroxide, alcohols, and amines, is presented.
Iodine(III)-promoted synthesis of oxazolines from N-allylamides
作者:Nicholas G. Moon、Andrew M. Harned
DOI:10.1016/j.tetlet.2013.03.140
日期:2013.6
PhI(OAc)(2) (activated by BF3 center dot OEt2) has been used to promote the oxidative cyclization of N-allylamides to give oxazolines. The reaction products are formed in high yield and, when a branched allylic amine is used, high diastereoselectivity. Initial mechanistic experiments suggest that the final C-O bond is formed from a reactive tight ion pair, rather than a neutral external nucleophile. (C) 2013 Elsevier Ltd. All rights reserved.