(+)-Faranal , the trailpheromone of Pharaoh'sant, was synthesized in 10 % overall yield starting from an easily available chiral building block and employing diastereoselective carbon—carbon bond formation.
(+)-Faranal 1a, the trailpheromone of Pharaoh'sant, and its congener, (+)-13-norfaranal 1b were synthetized from chiral building block 4 employing diastereoselective carbon-carbon bond formation. The application of crude pig liver esterase enzyme for the preparation of 4 is also discussed.