Abstract

A two-step, metal-free process for stereoselective allylic 1,3-dienylation of Morita–Baylis–Hillman (MBH) carbonates under mild reaction conditions has been developed. Using cyclic allylic nitro compounds as potential dienylating reagents, the transformation proceeds through tertiary amine-catalyzed allylic alkylation with MBH carbonates (14 examples, up to 94% yield), followed by AcOH-mediated denitration (12 examples, up to 87% yield), affording allylic 1,3-dienyl MBH derivatives with exclusive (E)-selectivity.

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