Sodium Carbonate → 2-Amino-3-{4-[6-(3-cyclopentyloxy-4-methoxy-benzylamino)-pyrazin-2-yl]-phenyl}-propionic acid

HRID 254753Notes

Reaction equation

HRID 254753 reaction equation
Cl[C:2]1[N:7]=[C:6]([NH:8][CH2:9][C:10]2[CH:15]=[CH:14][C:13]([O:16][CH3:17])=[C:12]([O:18][CH:19]3[CH2:23][CH2:22][CH2:21][CH2:20]3)[CH:11]=2)[CH:5]=[N:4][CH:3]=1.B([C:27]1[CH:38]=[CH:37][C:30]([CH2:31][C@@H:32]([C:34]([OH:36])=[O:35])[NH2:33])=[CH:29][CH:28]=1)(O)O.C(=O)([O-])[O-].[Na+].[Na+]>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.C(#N)C>[NH2:33][CH:32]([CH2:31][C:30]1[CH:37]=[CH:38][C:27]([C:2]2[CH:3]=[N:4][CH:5]=[C:6]([NH:8][CH2:9][C:10]3[CH:15]=[CH:14][C:13]([O:16][CH3:17])=[C:12]([O:18][CH:19]4[CH2:23][CH2:22][CH2:21][CH2:20]4)[CH:11]=3)[N:7]=2)=[CH:28][CH:29]=1)[C:34]([OH:36])=[O:35]

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 150315L-p-BoronophenylalanineHCID 866142996-chloro-N-(3-(cyclopentyloxy)-4-methoxybenzyl)pyrazin-2-amine

Product 1

HCID 666492442-Amino-3-{4-[6-(3-cyclopentyloxy-4-methoxy-benzylamino)-pyrazin-2-yl]-phenyl}-propionic acidYield 7.9%

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 6342AcetonitrileSolvent

Conditions

Temperature
150 °C

Procedure

An Emrys process vial (2-5 ml) for microwave was charged with (6-chloro-pyrazin-2-yl)-(3-cyclopentyloxy-4-methoxy-benzyl)-amine (50 mg, 0.15 mmol), 4-borono-L-phenylalanine (31 mg, 0.15 mmol) and 2 ml of acetonitrile. Aqueous sodium carbonate (2 ml, 1M) was added to the solution followed by 5 mol percent of dichlorobis(triphenylphosphine)-palladium(II). The reaction vessel was sealed and heated to 150° C. for 5 minutes by microwave. After cooling, the reaction mixture was evaporated to dryness. The residue was dissolved in 2.5 ml of methanol, and the product was purified with Prep-LC to give 5.5 mg of 2-amino-3-{4-[6-(3-cyclopentyloxy-4-methoxy-benzylamino)-pyrazin-2-yl]-phenyl}-propionic acid, yield 6%. 1H-NMR (400 MHz, DMSO-d6): δ 1.46 (m, 2H), 1.62 (m, 4H), 3.01 (m, 2H), 3.08 (m, 2H), 3.65 (s, 3H), 4.0 (m, 1H), 4.45 (d, 2H), 4.65 (m, 1H), 6.90 (s, 2H), 6.95 (s, 1H), 7.32 (d, 2H), 7.60 (t, 1H), 7.90 (s, 1H), 7.95 (d, 2H), 8.25 (s, 1H).

Workup

  1. customThe reaction vessel was sealed
  2. temperatureAfter cooling
  3. customthe reaction mixture was evaporated to dryness
  4. dissolutionThe residue was dissolved in 2.5 ml of methanol
  5. customthe product was purified with Prep-LC

Sources & evidence

ORD record
ord-f26fa2faa13b4086bb4cbc48c00e5f8a
Source dataset
uspto-grants-2011_01
Patent number
US07875622B2

Reaction notes

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