A simple four-step synthesis of a 6,6-disubstituted 6a,12a-dihydro-6H,12H- benzopyrano[3,4,-b]-benzopyran-12-one 6 from a chroman-4-one 3 is described. Application of the synthetic strategy to a thiochroman-4-one leads to the 5-thiorotenoid system.
|Number of pages||5|
|Journal||Journal of the Chemical Society, Perkin Transactions 1|
|Publication status||Published - 1 Dec 1994|