Water → trans-4-amino-1-tert-butoxycarbonyl(2S)-(tert-butyldiphenylsilyloxy)methylpyrrolidine

HRID 350514Notes

Reaction equation

HRID 350514 reaction equation
Br[C@@H:2]1[CH2:6][N:5]([C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8])[C@H:4]([CH2:14][O:15][Si:16]([C:29]([CH3:32])([CH3:31])[CH3:30])([C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[CH2:3]1.[N-:33]=[N+]=[N-].[Na+].O>CN(C=O)C.CCO.[Pd]>[NH2:33][C@H:2]1[CH2:6][N:5]([C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8])[C@H:4]([CH2:14][O:15][Si:16]([C:29]([CH3:32])([CH3:31])[CH3:30])([C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[CH2:3]1

Participants

7

Reactant 3

HCID 962WaterHCID 33557Sodium AzideHCID 69334767cis-4-bromo-1-tert-butoxycarbonyl-(2S)-(tert-butyldiphenylsilyloxy)methylpyrrolidine

Product 1

HCID 69332987trans-4-amino-1-tert-butoxycarbonyl(2S)-(tert-butyldiphenylsilyloxy)methylpyrrolidineYield 95%

Reagents, catalysts & solvents 3

HCID 23938PalladiumCatalystHCID 702EthanolSolventHCID 6228DimethylformamideSolvent

Procedure

To a stirred solution of cis-4-bromo-1-tert-butoxycarbonyl-(2S)-(tert-butyldiphenylsilyloxy) methylpyrrolidine (480 mg, 0.93 mmol) in DMF (5 ml) was added NaN3 (241 mg, 3.70 mmol) at room temperature. The reaction mixture was stirred at 70 for 3 days. Water was added thereto, and extracted with EtOAc. The extract was washed with water, then dried over Na2SO4, and concentrated in vacuo. The crude product was used to the subsequent reaction without further purification. The solution of the crude residue in EtOH (10 ml) was hydrogenated over 10% Pd—C under an atmospheric pressure at room temperature for 4 hr. The catalyst was filtered off, and the filtrate was concentrated in vacuo to give trans-4-amino-1tert-butoxycarbonyl-(2S)-(tert-butyldiphenylsilyloxy)methylpyrrolidine (400 mg, 95%) as a colorless oil. 1H-NMR (CDCl3) δ 1.06 (s, 9H), 1.32 and 1.45 (each s, total 9H), 2.20–2.35 (m, 1H), 3.05–3.18 (m, 1H), 3.55–4.05 (m, 6H), 7.35–7.41 (m, 6H), 7.61–7.69 (m, 4H).

Workup

  1. extractionextracted with EtOAc
  2. washThe extract was washed with water
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated in vacuo
  5. customThe crude product was used to the subsequent reaction without further purification
  6. filtrationThe catalyst was filtered off
  7. concentrationthe filtrate was concentrated in vacuo

Sources & evidence

ORD record
ord-9035888213764b3ea0846d5050d64283
Source dataset
uspto-grants-2007_02
Patent number
US07179819B2

Reaction notes

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