反应详情

A parr flask containing 2-methyl-L-proline (1.0 g, 7.7 mmol, 1.0 eq.), 40 mL of methanol, Formaldehyde 37 wt. % in water (2.1 mL, 77 mmol, 10 eq.), and Palladium 10 wt. % on Carbon (313 mg, 2.94 mmol, 0.38 eq.) was placed on a parr shaker and allowed to shake under 40 psi of hydrogen for -12 hours. Hydrogen was removed and the reaction was filtered through a pad of celite which was rinsed with a solution of 50% methanol 50% dichloromethane. Residue was concentrated in vacuo yielding #150 (1.1 g, 100%) as a white slight black colored solid. LC-MS (Protocol Q): m/z 144.0 [M+H+] retention time=0.17 minutes.

1. customHydrogen was removed
2. filtrationthe reaction was filtered through a pad of celite which
3. washwas rinsed with a solution of 50% methanol 50% dichloromethane
4. concentrationResidue was concentrated in vacuo