Potassium Bicarbonate → 3-[(2-Chloro-5-nitro-pyrimidin-4-yl)-isopropyl-amino]-propanoic acid tert-butyl ester

HRID 2111347Notes

Reaction equation

HRID 2111347 reaction equation
[C:1]([O:5][C:6](=[O:13])[CH2:7][CH2:8][NH:9][CH:10]([CH3:12])[CH3:11])([CH3:4])([CH3:3])[CH3:2].[Cl:14][C:15]1[N:20]=[C:19](Cl)[C:18]([N+:22]([O-:24])=[O:23])=[CH:17][N:16]=1.C(=O)(O)[O-].[K+]>O.C(OCC)C>[C:1]([O:5][C:6](=[O:13])[CH2:7][CH2:8][N:9]([C:17]1[C:18]([N+:22]([O-:24])=[O:23])=[CH:19][N:20]=[C:15]([Cl:14])[N:16]=1)[CH:10]([CH3:11])[CH3:12])([CH3:4])([CH3:3])[CH3:2]

Participants

6

Reactant 3

HCID 516893Potassium BicarbonateHCID 5212662,4-Dichloro-5-nitropyrimidineHCID 42656868tert-Butyl 3-[(propan-2-yl)amino]propanoate

Product 1

HCID 866234133-[(2-Chloro-5-nitro-pyrimidin-4-yl)-isopropyl-amino]-propanoic acid tert-butyl esterYield 92.8%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 3283Diethyl EtherSolvent

Procedure

A solution of 0.935 g (0.005 mole) of 3-isopropylamino-propanoic acid tert-butyl ester in 20 mL of water was added dropwise to a solution of 0.97 g (0.005 mole) of 2,4-dichloro-5-nitro-pyrimidine in 20 mL of ethyl ether. At 0 degrees, 1.0 g (0.010 mole) of potassium bicarbonate was added. The mixture was stirred at ambient temperature for 3 hours. The layers were then separated, and the aqueous layer extracted twice with 30 mL of ether. The combined organic layers were dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. Purification by silica gel chromatography, eluting with hexanes-ethyl acetate (100:0-80:20) gave 1.6 g of 3-[(2-chloro-5-nitro-pyrimidin-4-yl)-isopropyl-amino]-propanoic acid tert-butyl ester (IV-43).

Workup

  1. customThe layers were then separated
  2. extractionthe aqueous layer extracted twice with 30 mL of ether
  3. dry with materialThe combined organic layers were dried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customPurification by silica gel chromatography
  7. washeluting with hexanes-ethyl acetate (100:0-80:20)

Sources & evidence

ORD record
ord-03806cc9011a4081bc698f2b84574e07
Source dataset
uspto-grants-2009_04
Patent number
US07517873B2

Reaction notes

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