Asymmetric Conjugate Addition of Azide to alpha,beta-Unsaturated Carbonyl Compounds Catalyzed by Simple Peptides This research was supported by the U.S. National Institutes of Health (GM-57595). We are also grateful to the U.S. National Science Foundation for generous support in the form of a CAREER Award (CHE-9874963). In addition, we thank DuPont, Eli Lilly, Glaxo-Wellcome, and the Merck Chemistry Council for research support. S.J.M. is a Fellow of the Alfred P. Sloan Foundation, a Cottrell Scholar of Research Corporation, and a Camille Dreyfus Teacher-Scholar.