tert-butyl 5-hydroxy-2-methylpiperidine-1-carboxylate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1.50 g (9.28 mmol) of 6-Hydroxymethyl-pyridin-3-ol hydrochlorid was hydrogenated under the conditions described in intermediate 63B. The crude product was dissolved in 5 ml DMF, 5.60 ml (32.00 mmol) of Hunig's base and 3.56 g (16.00 mmol) of BOC2O were added and the yellow solution was stirred 18 h at RT. Evaporation, extraction (AcOEt/water/brine) and chromatography (silica gel, AcOEt/MeOH) gave 0.35 g (15%) (rac)-5-hydroxy-2-methyl-piperidine-1-carboxylic acid tert-butyl ester; MS: 216.4 (MH+) Evaporation, extraction (AcOEt/water/brine) and chromatography (silica gel, AcOEt/MeOH)