Triethylamine → 3-{2-[2-(3,5-dimethoxyphenyl)ethyl]-5H-pyrrolo[2,3-b]pyrazin-6-yl}-N,N-diethylprop-2-yn-1-amine

HRID 1052248Notes

Reaction equation

HRID 1052248 reaction equation
[CH2:1]([N:3]([CH2:7][CH3:8])[CH2:4][C:5]#[CH:6])[CH3:2].C(N(CC)CC)C.Br[C:17]1[N:37](S(C2C=CC=CC=2)(=O)=O)[C:20]2=[N:21][CH:22]=[C:23]([CH2:25][CH2:26][C:27]3[CH:32]=[C:31]([O:33][CH3:34])[CH:30]=[C:29]([O:35][CH3:36])[CH:28]=3)[N:24]=[C:19]2[CH:18]=1.C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O.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.[Cu]I>[CH3:34][O:33][C:31]1[CH:32]=[C:27]([CH2:26][CH2:25][C:23]2[N:24]=[C:19]3[CH:18]=[C:17]([C:6]#[C:5][CH2:4][N:3]([CH2:7][CH3:8])[CH2:1][CH3:2])[NH:37][C:20]3=[N:21][CH:22]=2)[CH:28]=[C:29]([O:35][CH3:36])[CH:30]=1

Participants

8

Reactant 4

HCID 8471TriethylamineHCID 11430Potassium CarbonateHCID 20010DietylaminopropinHCID 899637236-bromo-2-[2-(3,5-dimethoxyphenyl)ethyl]-5-(phenylsulfonyl)-5H-pyrrolo[2,3-b]pyrazine

Product 1

HCID 730559583-{2-[2-(3,5-dimethoxyphenyl)ethyl]-5H-pyrrolo[2,3-b]pyrazin-6-yl}-N,N-diethylprop-2-yn-1-amineYield 20%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
60 °C

Procedure

A solution of N,N-diethylprop-2-yn-1-amine (10.6 mg, 95.5 μmol), bis(triphenylphosphine)palladium(II) chloride (2.8 mg, 4.0 μmol), copper(I) iodide (1.2 mg, 6.4 mmol), triethylamine (17.0 μL, 120 μmol), and 6-bromo-2-[2-(3,5-dimethoxyphenyl)ethyl]-5-(phenylsulfonyl)-5H-pyrrolo[2,3-b]pyrazine (from Example 1, Step 4, 40.0 mg, 79.7 μmol) in N,N-dimethylformamide (1.0 mL) was stirred at ambient temperature overnight. The reaction was quenched with saturated aq. NH4Cl, then extracted with methylene chloride. The combined organic layers were dried over MgSO4, and then concentrated. The residue was dissolved in methanol (2.0 mL) and potassium carbonate (22.0 mg, 0.159 mmol) was added. The reaction mixture was then warmed up to 60° C. After 1 hour, the crude mixture was allowed to warm to room temperature and was purified on RP-HPLC (XBridge C18 column, eluting with a gradient of acetonitrile/water containing 0.05% TFA, at flow rate of 30 mL/min) to give the desired product (6.0 mg, 20%) as its TFA salt. LCMS calculated for C23H29N4O2 (M+H)+: m/z=393.2. Found: 393.1.

Workup

  1. customThe reaction was quenched with saturated aq. NH4Cl
  2. extractionextracted with methylene chloride
  3. dry with materialThe combined organic layers were dried over MgSO4
  4. concentrationconcentrated
  5. dissolutionThe residue was dissolved in methanol (2.0 mL)
  6. temperatureto warm to room temperature
  7. customwas purified on RP-HPLC (XBridge C18 column
  8. washeluting with a gradient of acetonitrile/water containing 0.05% TFA, at flow rate of 30 mL/min)

Sources & evidence

ORD record
ord-c942e5f97fa74f729b66df088be2644b
Source dataset
uspto-grants-2016_07
Patent number
US09388185B2

Reaction notes

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