Synthesis and Enantiodifferentiation of Isomeric 3,5,6,8a-Tetrahydro-2,5,5,8a-tetramethyl-2H-1-benzopyrans (Edulans I and II)

Article abstract of DOI:10.1021/jf00049a034

The benzopyran derivatives 1a-d were prepared in a biomimetic-type reaction from their natural precursor 3-hydroxy-retro-α-ionol (6) which was available from α-ionol by tert-butyl chromate oxidation, reduction with NaBH4, and subsequent rearrangement of t