A NEW METHOD FOR PREPARATION OF DIHYDRODINAPHTHOPYRANOPYRANS

Article abstract of DOI:10.1016/S0040-4020(01)81642-2

The syntheses of 7a,15a-dihydro-15a-methylnaphtho<2,1-b> naphtho <1',2':5,6> pyrano<3,2-e>pyran (II) and 7a,15a-dihydro-7a-methyl-15a-isopropyl naphtho<2,1-b>naphtho<1',2':5,6>pyrano<3,2-e>pyran (III) from 2-naphthol and corresponding dimethylol ketones in one step were described.Amberlyst-15^R was used as catalyst.