In control: The first asymmetric total synthesis of (+)‐itomanallene A (revised structure) has been accomplished starting from commercially available (S)‐glycidol in a substrate‐controlled fashion. The approach yields α,α′‐cis‐ or α,α′‐trans‐tetrahydrofuran isomers by intramolecular alkylation with either an amide enolate or a nitrile anion, respectively.