Organocatalytic Asymmetric Sulfa-Michael/Michael Addition Reactions: A Strategy for the Synthesis of Highly Substituted Chromans with a Quaternary Stereocenter


  • We are grateful to the National Science Foundation of China (20872043) and the Program for Changjiang Scholars and Innovative Research Team in University (IRT0953) for supporting this research.


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Simply complex: Diverse and structurally complex chroman derivatives with a quaternary stereocenter have been obtained through the titled reaction of thiols with nitroolefin enoates using the bifunctional catalyst 1. The reaction features simple experimental procedures, high yield, enantiomeric excess, and excellent diastereoselectivity.