Abstract

Abstract Organolithium reagents add to cyclohexenyl sulfone 12 to provide β-amino sulfones that can be eliminated to afford cis- adducts 17a-c. Cuprate reagents undergo trans addition to cyclohexenyl ammonium salt 13 to generate the isomeric vinyl sulfones 18a-c. This stereochemistry is opposite to what had been previously observed in cyclopentenyl derivatives; mechanistic rationale is provided.

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