A naturally occurring drimanic sesquiterpenic lactone, isodrimenin, was syn
thesized from drim-8-en-7-one (1). Compound 1 was converted to the known 11
,12-dihydroxydrim-8-en-7-one, which was oxidized with PCC to give 7-oxoisod
rimenin, The thioketal of the latter compound was reduced with nickel borid
e or Raney nickel to give the target isodrimenin.