Development of novel chiral urea catalysts for the hetero-Michael reaction |
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Authors: | Sohtome Yoshihiro Tanatani Aya Hashimoto Yuichi Nagasawa Kazuo |
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Affiliation: | Institute of Molecular and Cellular Biosciences, The University of Tokyo, Japan. |
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Abstract: | Chiral urea compounds 10a-g were synthesized as catalysts for conjugate addition of pyrrolidine (2) to gamma-crotonolactone (3). In the presence of a catalytic amount of the chiral ureas, this hetero-Michael reaction was greatly accelerated. Asymmetric induction was observed with the catalysts 10e, 10f, and 10g. |
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