tert-Butyl (6-methylpyridin-2-yl)carbamate → HCID 59858004, compound

Participants

Reaction Steps

A solution of (6-methyl-pyridin-2-yl)-carbamic acid tert-butyl ester I-1 (0.00625 mol) in 10 mL THF was cooled in a −78° C. bath (acetone/dry ice). n-BuLi (1.6 M in hexanes, 0.0125 mol) was added during 15 min. under N2. The color of solution was changed from colorless to orange. Then the cooling bath was removed. After 45 min stirring at room temperature, the color solution was changed into dark red. The solution was then returned to the −78° C. bath. 3-Benzyl-6-oxa-3-aza-bicyclo[3.1.0]hexane I-2 (0.005 mol) in 10 mL THF was added during 1 h. After 2 h, the cooling bath was removed. The solution was stirred for 2 h more at room temperature. The reaction was quenched by the addition of ice-cold water (50 ml). The mixture was extracted with CH2Cl2 (30 ml×3). The combined organic layers were washed with brine and dried over anhydrous MgSO4. The solvent was removed in vacuo and the residue was purified by column chromatography (silica gel, CH2Cl2: MeOH, 9:1) (90%).

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