Hydrochloric Acid → Tert-butyl (2S,5R)-2-(4-aminobenzyl)-5-[(R)-{[tert-butyl(dimethyl)silyl]oxy}(phenyl)methyl]pyrrolidine-1-carboxylate

HRID 1947692Notes

Reaction equation

HRID 1947692 reaction equation
[Si:1]([O:8][C@H:9]([C:32]1[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1)[C@H:10]1[CH2:14][CH2:13][C@@H:12]([CH2:15][C:16]2[CH:21]=[CH:20][C:19]([N+:22]([O-])=O)=[CH:18][CH:17]=2)[N:11]1[C:25]([O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[O:26])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].Cl.[H][H]>CO.[Pd]>[NH2:22][C:19]1[CH:18]=[CH:17][C:16]([CH2:15][C@@H:12]2[CH2:13][CH2:14][C@H:10]([C@H:9]([O:8][Si:1]([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2])[C:32]3[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=3)[N:11]2[C:25]([O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[O:26])=[CH:21][CH:20]=1

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 57907416Tert-butyl (2R,5S)-2-[(R)-{[tert-butyl(dimethyl)silyl]oxy}(phenyl)methyl]-5-(4-nitrobenzyl)pyrrolidine-1-carboxylateHCID 178418361HCID 178418361, compound

Product 1

HCID 57907438Tert-butyl (2S,5R)-2-(4-aminobenzyl)-5-[(R)-{[tert-butyl(dimethyl)silyl]oxy}(phenyl)methyl]pyrrolidine-1-carboxylate

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent3×

Procedure

A 500 mL parr shaker flask was charged with 10% Pd/c (4.75 g) and to this was added 100 mL of methanol to cover the catalyst. A solution of the nitro intermediate from Step I (8.5 g, 18.5 mmol) in methanol (80 mL) was then added to the suspension, followed by 15.4 mL of 1.0 M hydrogen chloride in methanol solution. The reaction vessel was set under 50 PSI hydrogen gas and the mixture aggitated overnight. An aliquot was taken and analyzed through the LC-MS which showed complete reaction.

Workup

  1. customthe mixture aggitated overnight
  2. customreaction

Sources & evidence

ORD record
ord-7170812893c1426ea5af89068263bd25
Source dataset
uspto-grants-2013_03
Patent number
US08399480B2

Reaction notes

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