tert-Butyl carbonate → Tert-butyl(5R)-2-(4-aminobenzyl)-5-[(R)-{[tert-butyl(dimethyl)silyl]oxy}(phenyl)methyl]pyrrolidine-1-carboxylate
Reaction equation
[C:1](=[O:8])([O-])[O:2][C:3]([CH3:6])([CH3:5])[CH3:4].[Si:9]([O:16][C@H:17]([C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1)[C@@H:18]1[NH:22][CH:21]([CH2:23][C:24]2[CH:30]=[CH:29][C:27]([NH2:28])=[CH:26][CH:25]=2)[CH2:20][CH2:19]1)([C:12]([CH3:15])([CH3:14])[CH3:13])([CH3:11])[CH3:10]>>[NH2:28][C:27]1[CH:26]=[CH:25][C:24]([CH2:23][CH:21]2[CH2:20][CH2:19][C@H:18]([C@H:17]([O:16][Si:9]([C:12]([CH3:13])([CH3:15])[CH3:14])([CH3:10])[CH3:11])[C:31]3[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=3)[N:22]2[C:1]([O:2][C:3]([CH3:6])([CH3:5])[CH3:4])=[O:8])=[CH:30][CH:29]=1Participants
Procedure
To a solution of 121 mg (0.315 mmol) of 4-({(5R)-5-[(R)-([tert-butyl(dimethyl)silyl]oxy}(phenyl)methyl]pyrrolidin-2-yl}methyl)aniline in 5 mL of anhydrous THF (from Step B) was added tert-butyl carbonate (69 mg, 0.315 mmol), followed by TEA (44 μL, 0.315 mmol) and the resulting solution stirred at room temperature under nitrogen atmosphere overnight. The reaction mixture was put directly on a preparative plate (1500 μM) and eluted with 30% ethyl acetate in hexane to afford the title compound (100 mg, 64%). m/z (ES) 497 (MH)+, 397 (M-Boc)+. 1HNMR (500 MHz, CDCl3) δ: 7.40-7.30 (m, 5H), 6.75-6.68 (m, 2H), 6.56-6.51 (m, 2H), 5.52-5.48 (m, 1H), 5.32-5.28 (m, 1H), 4.16-4.06 (m, 2H), 3.88-3.82 (m, 1H), 3.76-3.70 (m, 1H), 3.55-3.48 (m, 2H), 2.74 (br d, J=11.8 Hz, 1H), 2.44 (br d, J=11.8 Hz, 1H), 2.05-1.94 (m, 1H), 1.90-1.82 (m, 1H), 1.60 (s, 9H), 1.50-1.42 (m, 1H), 1.32-1.22 (m, 2H), 1.10-1.02 (m, 1H), 0.95 (s, 9H), 0.08 (s, 3H), −0.15 (s, 3H).
Workup
- washeluted with 30% ethyl acetate in hexane
Sources & evidence
- ORD record
- ord-2508835eaca04683842651f4069d8965
- Source dataset
- uspto-grants-2014_02
- Patent number
- US08653260B2
Reaction notes
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