Enantioselective iodocycloetherifications can be conducted using sterically highly demanding BINOL‐based phosphoric acid diesters as catalyst. To achieve highly enantioselective reactions, cocatalysis by triphenylphosphine selenide is necessary. With cocatalysis, good to excellent enantioselectivities can be achieved for a broad range of substrates using catalyst and cocatalyst loadings as low as 1 mol %. The triphenylphosphine selenide cocatalyst itself does not strongly influence diastereoselectivity, but leads to higher reactivity and, in combination with a BINOL‐based phosphoric acid diester, to good enantioselectivity.