Chelating Carboxylic Acid Amides as Robust Relay Protecting Groups of Carboxylic Acids and their Cleavage under Mild Conditions
作者:Manuel C. Bröhmer、Stephan Mundinger、Stefan Bräse、Willi Bannwarth
DOI:10.1002/anie.201100271
日期:2011.6.27
Free choice: Carboxamides of bispicolylamine are alternative protectinggroups for carboxylic acids (see scheme). As a consequence of their straightforward applicability, their high chemical stability towards a broad range of conditions, and their selective cleavage undermildconditions to give either carboxylic acids or their methyl esters, this new protection method should find widespread application