hydrogen bromide

With  ammonia; lithium in  tetrahydrofuran; tert-butyl alcohol  

Multi-step reaction with 2 steps 1: 1.) lithium hexamethyldisilazide / 1.) THF, -78 deg C, 1 h 2.) THF, -78 deg C to room temperature, overnight2: 1.) Li/NH3/HMDS 2.) lithium hexamethyldisilazide, chlorotrimethylsilane, Li / 1.) THF, t-butanol, -78 deg C, 13 min 2.) THF, 0 deg C, 20 min then -78 deg C