Tetrabutylammonium Fluoride → Tert-butyl 4-hydroxy-2-(methoxymethyl)pyrrolidine-1-carboxylate
反応式
[Si]([O:8][C@H:9]1[CH2:13][N:12]([C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[C@H:11]([CH2:21][O:22][CH3:23])[CH2:10]1)(C(C)(C)C)(C)C.[F-].C([N+](CCCC)(CCCC)CCCC)CCC>O1CCCC1>[C:17]([O:16][C:14]([N:12]1[CH2:13][CH:9]([OH:8])[CH2:10][CH:11]1[CH2:21][O:22][CH3:23])=[O:15])([CH3:20])([CH3:19])[CH3:18]参加物
4
実験手順
A solution of (2S,4R)-4-(tert-butyldimethylsilyloxy)-1-(tert-butoxycarbonyl)-2-methoxymethylpyrrolidine (4.48 g) and tetrabutylammonium fluoride (1 Mol tetrahydrofuran solution, 13 ml) in tetrahydrofuran (45 ml) was stirred at 0° C. for eight hours. The reaction mixture was extracted with ethyl acetate, and the organic layer was separated, washed with brine, dried over magnesium sulfate. Evaporation of the solvent gave an oil, which was chromatographed on silica gel (300 ml) eluting with a mixture of hexane and ethyl acetate (1:2, V/V) to give (2S,4R)-1-(tert-butoxycarbonyl-4-hydroxy-2-methoxymethylpyrrolidine (2.82 g).