Omar CHERKAoui,Pascal NEBois,and Houda FiLLioN* ... Laboratoirede Chimie Organique,Institutdes SciencesPharniaceutiqueset Biologiques,UniversiteClaude Bernard, 8 Avenue Rockqfeller,69373L}'onCedex 08,F?ance, Receivcd September 17,]996;accepted ... Maturinone was eMciently prepared by means of a regiocontrolled Diels-Ald ... Resultsand Discussion Compound 1 was firstobtained by semisynthesis in ... 1966.6)A fewmonths later,itwas ...