Copper-catalyzed asymmetric addition of diethylzinc to Boc-protected imines
摘要:
A new class of substrates has been tested in the addition of Et(2)Zn, catalyzed by copper and phosphoramidite, providing the expected a branched protected amine in quantitative conversion, good yield and excellent enantioselectivity up to 97%. (C) 2008 Elsevier Ltd. All rights reserved.