Potassium Bicarbonate → HCID 87617973, compound

HRID 2111338Notes

Reaction equation

HRID 2111338 reaction equation
[CH2:1]([O:3][C:4](=[O:15])[CH:5]([CH3:14])[CH:6]([NH:8][CH:9]1[CH2:13][CH2:12][CH2:11][CH2:10]1)[CH3:7])[CH3:2].[Cl:16][C:17]1[N:22]=[C:21](Cl)[C:20]([N+:24]([O-:26])=[O:25])=[CH:19][N:18]=1.C(=O)(O)[O-].[K+]>O.C(OCC)C>[CH2:1]([O:3][C:4](=[O:15])[CH:5]([CH3:14])[CH:6]([N:8]([C:19]1[C:20]([N+:24]([O-:26])=[O:25])=[CH:21][N:22]=[C:17]([Cl:16])[N:18]=1)[CH:9]1[CH2:13][CH2:12][CH2:11][CH2:10]1)[CH3:7])[CH3:2]

Participants

6

Reactant 3

HCID 516893Potassium BicarbonateHCID 5212662,4-Dichloro-5-nitropyrimidineHCID 57635075HCID 57635075, compound

Product 1

HCID 87617973HCID 87617973, compoundYield 75.5%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 3283Diethyl EtherSolvent

Procedure

A solution of 1.07 g (0.005 mole) of (rac)-3-cyclopentylamino-2-methyl-butanoic acid ethyl ester in 30 mL of water was added dropwise to a solution of 0.97 g (0.005 mole) of 2,4-dichloro-5-nitro-pyrimidine in 30 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 1.4 g of (rac)-3-[(2-chloro-5-nitro-pyrimidin-4-yl)-cyclopentyl-amino]-2-methyl-butanoic acid ethyl ester (IV-41).

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-2f85eef978f64a9180e07c245c781daf
Source dataset
uspto-grants-2009_04
Patent number
US07517873B2

Reaction notes

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