Abstract
AbstractA 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 state model was proposed to explain the stereocontrol.magnified image
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