Shuanghua Cheng and Shouyun Yu
Org. Biomol. Chem., 2014,12, 8607-8610
DOI:
10.1039/C4OB01646G,
Communication
A highly enantioselective intramolecular 6-exo-trig aza-Michael addition was developed to afford chiral 3-substituted 1,2-oxazinanes in high yields (up to 99% yield) and good enantioselectivities (up to 98/2 er). These reactions were enabled by a quinine-derived primary–tertiary diamine as a catalyst and pentafluoropropionic acid (PFP) as a co-catalyst.