(2R)-(+)- and (2S)-(−)-2-iodohexadecanal 1 with ee's ≥ 89% were synthesized in five steps and 62% overall yield from chiral enol ethers , via the iodocyclization with IC1 and chromatographic separation of the resulting diastereomeric 1′-iododioxanes 8. The ee's of have been determined after their transformation to the (R)-O-methylmandelate esters 11 and 12 or to the epoxides , respectively. Their absolute