Formaldehyde → (2R,3R,4R)-3,4-dibenzyloxy-2-benzyloxymethyl-1-methylpyrrolidine
反応式
[CH2:1]([O:8][C@H:9]1[C@H:13]([O:14][CH2:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[CH2:12][NH:11][C@@H:10]1[CH2:22][O:23][CH2:24][C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH2:31]=O>C(O)=O>[CH2:1]([O:8][C@H:9]1[C@H:13]([O:14][CH2:15][C:16]2[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=2)[CH2:12][N:11]([CH3:31])[C@@H:10]1[CH2:22][O:23][CH2:24][C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1参加物
4
実験手順
A mixture of (2R,3R,4R)-3,4-dibenzyloxy-2-benzyloxymethylpyrrolidine (Compound 1) (0.5 g, 1.24 mmol), formic acid (10 ml) and 37% formaldehyde (7.5 ml) was heated for 3 hours at reflux temperature and evaporated in vacuo. The residue was dissolved in a mixture of ethyl acetate (25 ml) and 1 N sodium hydroxide (25 ml). The organic phase was isolated, washed once with water, dried over magnesium sulphate and evaporated in vacuo to give (2R,3R,4R)-3,4-dibenzyloxy-2-benzyloxymethyl-1-methylpyrrolidine (0.49 g, yield: 95%) as a golden oil.