HCID 68408428, compound → (+/-)-tert-butyl 5-(3-aminopyridin-4-yl)-7-methyl-2-oxohexahydrobenzo[d]oxazole-3(2H)-carboxylate

HRID 2192573Notes

Reaction equation

HRID 2192573 reaction equation
[CH3:1][CH:2]1[CH:10]2[CH:6]([N:7]([C:12]([O:14][C:15]([CH3:18])([CH3:17])[CH3:16])=[O:13])[C:8](=[O:11])[O:9]2)[CH:5]=[C:4]([C:19]2[CH:24]=[CH:23][N:22]=[CH:21][C:20]=2[N+:25]([O-])=O)[CH2:3]1>CO.[Pd]>[NH2:25][C:20]1[CH:21]=[N:22][CH:23]=[CH:24][C:19]=1[CH:4]1[CH2:5][CH:6]2[N:7]([C:12]([O:14][C:15]([CH3:17])([CH3:16])[CH3:18])=[O:13])[C:8](=[O:11])[O:9][CH:10]2[CH:2]([CH3:1])[CH2:3]1

Participants

4

Reactant 1

HCID 68408428HCID 68408428, compound

Product 1

HCID 68409051(+/-)-tert-butyl 5-(3-aminopyridin-4-yl)-7-methyl-2-oxohexahydrobenzo[d]oxazole-3(2H)-carboxylateYield 99%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent

Procedure

To a solution of (+/−)-tert-butyl 7-methyl-5-(3-nitropyridin-4-yl)-2-oxo-3a,6,7,7a-tetrahydrobenzo[d]oxazole-3(2H)-carboxylate (1.0 equiv.) in MeOH and ethyl:acetate (1:1, 0.07 M) was added 10% Pd/C (0.1 equiv.) and the reaction was stirred at room temperature under an atmosphere of hydrogen. Upon completion of the reaction, the solution was filtered through a pad of Celite, washed with MeOH and ethyl acetate, the filtrate was concentrated to dryness under vacuo to give (+/−)-tert-butyl 5-(3-aminopyridin-4-yl)-7-methyl-2-oxohexahydrobenzo[d]oxazole-3(2H)-carboxylate as a mixture of diastereomers in >99% yield. LC/MS=348.2 (M+H), Rt=0.50 min.

Workup

  1. customUpon completion of the reaction
  2. filtrationthe solution was filtered through a pad of Celite
  3. washwashed with MeOH and ethyl acetate
  4. concentrationthe filtrate was concentrated to dryness under vacuo

Sources & evidence

ORD record
ord-13f0c82736004da2af9979a40bee13f2
Source dataset
uspto-grants-2012_12
Patent number
US08329732B2

Reaction notes

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