An efficient and chemoselective Brønsted acidic ionic liquid-catalyzed N-Boc protection of amines
摘要:
The first report of a Bronsted acidic ionic liquid, 1-methylimidazolium tetrafluoroborate [(HMIm)BF(4)], catalyzed efficient and chemoselective N-Boc protection of various amines using (Boc)(2)O is presented. Optically pure amino alcohols and amino acid esters were converted efficiently to their corresponding optically pure N-Boc derivatives. The reported method is mild, solvent-free and has the advantages of both homogeneous and heterogeneous catalysis with high product yields, selectivity and ease of product separation. (c) 2008 Elsevier Ltd. All rights reserved.
[EN] 3,4,5-TRISUBSTITUTED-1,2,4-TRIAZOLES AND 3,4,5-TRISUBSTITUTED-3-THIO-1,2,4-TRIAZOLES AND USES THEREOF<br/>[FR] 1,2,4-TRIAZOLES 3,4,5-TRISUBSTITUÉS ET 3-THIO-1,2,4-TRIAZOLES 3,4,5-TRISUBSTITUÉS ET LEURS UTILISATIONS
申请人:BOARD OF TRUSTEES OF THE SOUTHERN ILLINOIS UNIV ON BEHALF OF SOUTHERN ILLINOIS UNIV EDWARDSVILLE