Gietter-Burch AAS, Mitrut RE, Watson DA. Highly Diastereoselective Michael Reactions Using β-Nitrocarbonyl Nucleophiles.
Org Lett 2015;
17:5468-71. [PMID:
26502157 DOI:
10.1021/acs.orglett.5b02832]
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Abstract
We have discovered a highly diastereoselective Michael reaction of α-substituted, β-nitrocarbonyl compounds to deliver highly functionalized stereodiads containing fully substituted nitrogen-bearing centers. Good to excellent yields and diastereoselectivities are observed. This transformation is tolerant of various types of carbonyl groups on the nucleophilic partner, as well as a range of unsaturated electrophiles. Mechanistic investigations are consistent with internal hydrogen bonding in the nitroalkane tautomer as the major factor in the control of diastereoselectivity in these transformations.
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