1: 1.) BuLi / 1.) hexane, THF, 30 min, 2.) THF, -78 deg C, 30 min 2: KH / 1.) 0 deg C, 30 min, 2.) RT, 30 min 3: potassium fluoride, KHCO3, H2O2 / methanol; tetrahydrofuran / 5 h / Ambient temperature View Scheme

potassium fluoride; dihydrogen peroxide; potassium hydride