Synthesis of grifolin and dihydrodeoxytauranin
Abstract
Condensation of farnesol and orcinol afforded grifolin (II; R = H). Grifolin diacetate was cyclised on treatment with boron trifluoride to a tricyclic compound (IV), having the same skeleton as tauranin (I). Compound (IV) was converted into dihydrodeoxytauranin acetate (IXa and b).