抄録
Oxidation of the silyl enol ether of (2RS, 5RS, 10RS)-6, 10-dimethyl-2-pivaloyloxyspiro[4.5]dec-6-en-8-one (5) with triphenyl phosphite ozonide (TPPO) gave stereoselectively the C9-hydroxylated derivative (6a), which was transformed into a spirovetivane phytoalexin, (±)-3-hydroxysolavetivone (1), by a several-step sequence.