T=276°C; stereochemistry of isomerization;

methanol; Me3SiCH2K 18 h; Ambient temperature<D>labeled study; MechanismProduct distribution;

1: 87 percent / N-bromosuccinimide, dibenzoyl peroxide / CCl4 / 4 h / Heating 2: 74 percent / pentane / 3 h / 0 °C 3: 97 percent / diethyl ether / 4 h / 25 °C 4: 1) Ag2O / 1) H2O, 25 deg C, 14 h, 2) 120-180 deg C, 10 mbar or KOtBu, DMSO, 50 deg C, 10 mbar, 14 h View Scheme