反应详情

(R)-tert-Butyl 3-((R)-(5-chloro-2-methylphenyl)(2-(methoxycarbonylamino)ethoxy)methyl)piperidine-1-carboxylate (1.0 g, 2.27 mmol) was dissolved in a solution of 20% (V/V) TFA/CH2Cl2 (20 mL). The reaction mixture was stirred at room temperature for 2 h, TLC showed the starting material disappeared, a solution of saturated sodium bicarbonate was added dropwise to adjust pH=7-8. The resulting mixture was extracted with CH2Cl2 (3×30 mL), washed with brine, dried over Na2SO4, concentrated in vacuo to afford methyl 2-((R)-(5-chloro-2-methylphenyl)((R)-piperidin-3-yl)methoxy)ethylcarbamate (780 mg, 100%).

1. extractionThe resulting mixture was extracted with CH2Cl2 (3×30 mL)
2. washwashed with brine
3. dry with materialdried over Na2SO4
4. concentrationconcentrated in vacuo