Notizen: A New , Short Synthesis of Z-Jasmone

Abstract
Z-Jasmone (1) was prepared from ethylene ketal of 0,0-diethyl-4-oxo-pentanephosphonate (2) in four steps in 36% overall yield. A key step in this synthesis is the oxygenation of the .alpha.-phosphonate carbanion generated from the monoalkylation product of 2 with Z-3-hexen-1-yl iodide (3).