Rearrangement of Tetramethyl-trans-decalin Derivatives

Abstract
The dihydroxydecalin (6) was treated with iodine at 140 °C to give the octalins (13 and 14). Treatment of the β-epoxide (8) with boron trifluoride etherate gave the octalins [17 and 18 (or 19)] and the oxide (20).