| abstract |
The preparation of bicyclic enol-ethers (I) ##STR1## (where n is from 3 to 12, and R 1 , R 2 and R 3 may be H or C 1 --C 4 -alkyl) by free radical adduct formation of CHR 1 =CR 2 --CHR 3 --O--R 4 (III)(where R 4 is tert.-butyl, tetrahydrofuran-2-yl or tetrahydropyran-2-yl) with a cyclic ketone (IV) ##STR2## followed by acid-catalyzed cyclization, and novel compounds II ##STR3## The compounds (I) and (II) are intermediates for the synthesis of musk-like fragrances. |