differentiation of the asymmetric reaction space is possible by the remote control of the pentafluorophenyl group. Furthermore, we have conducted theoretical studies to clarify the roles of both intra- and intermolecular hydrogen bonds in the C1-symmetric chiral environment of chiral bis-phosphoric acid catalysts. The developed strategy, C1-symmetric catalyst design through hydrogenbonding, is potentially applicable
A chiral N,N′‐dioxide/Copper(II) complex‐catalyzed highly regio‐ and enantioselective nitroso Diels−Alder (NDA) reaction of 2‐nitrosopyridines with 1,3‐diene‐1‐carbamates was described. A series of 3,6‐dihydro‐1,2‐oxazines were obtained in good to excellent yields and ee values. On the basis of the control experiments, ESI‐MS analysis and the absolute configuration of the product, a possible transition