All-(Z)-cyclooctadeca-1,4,7,10,13,16-hexaene: structure and first preparation via an intramolecular Wittig reaction

The first synthesis of all-(Z)-cyclooctadeca-1,4,7,10,13,16-hexaene was achieved using an intramolecular Wittig reaction as a key step. The structure was firmly established by X-ray analysis.