Highly diastereoselective Friedel–Crafts reaction of indoles with an N-tert-butanesulfinylimino ester: an efficient and practical approach to enantiomerically enriched α-(3-indolyl)glycines†
Abstract
An efficient, mild and general method for the preparation of highly enantiomerically enriched α-(3-indolyl)glycines by the transition-metal-based Lewis acid-catalyzed diastereoselective Friedel–Crafts reaction of indoles with an