Glogowski MP, Matthews JM, Lawhorn BG, Minbiole KPC. Diastereoselective Copper-Mediated Conjugate Addition of Functionalized Magnesiates for the Preparation of Bisaryl Nrf2 Activators.
J Org Chem 2021;
86:3120-3137. [PMID:
33555189 DOI:
10.1021/acs.joc.0c02639]
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Abstract
A two-step metal-halogen exchange and diastereoselective copper-mediated Michael addition onto a complex α,β-unsaturated system has been developed and applied toward the synthesis of bisaryl Nrf2 activators. Optimization of metal-halogen exchange using (n-Bu)3MgLi allowed for the preparation of custom aryl-functionalized magnesiate reagents at noncryogenic temperatures. Following transmetalation, these reagents were used in highly diastereoselective Michael addition reactions.
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