Stereodivergent Access to Aliphatic Nitro Compounds Bearing Multi-Contiguous Stereocenters via Sequential Catalysis.

Herein, we report a highly efficient synthesis of aliphatic nitro compounds bearing multi-contiguous stereocenters in good yields (up to 72%) with excellent diastereo- and enantio-selectivities (up to 12:1 dr, and >99% ee) by combining copper-catalyzed asymmetric conjugate addition of dialkylzinc reagents to nitroalkenes with iridium-catalyzed asymmetric allylic substitution reaction. Stereodivergent construction of nonadjacent stereocenters (1,3-positions) has been achieved by combining two chiral catalysts with different enantiomers. By first introducing a chiral center at the β-position of the nitro group, highly diastereoselective control has been achieved in iridium-catalyzed allylic substitution reaction of prochiral nitro compounds.