Dichloromethane → {4-[2-[2-(3,5-dimethoxyphenyl)ethyl]-5-(phenylsulfonyl)-5H-pyrrolo[2,3-b]pyrazin-6-yl]-1H-pyrazol-1-yl}acetic acid

HRID 1052264Notes

Reaction equation

HRID 1052264 reaction equation
Br[C:2]1[N:22]([S:23]([C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=2)(=[O:25])=[O:24])[C:5]2=[N:6][CH:7]=[C:8]([CH2:10][CH2:11][C:12]3[CH:17]=[C:16]([O:18][CH3:19])[CH:15]=[C:14]([O:20][CH3:21])[CH:13]=3)[N:9]=[C:4]2[CH:3]=1.ClCCl.C([O:39][C:40](=[O:56])[CH2:41][N:42]1[CH:46]=[C:45](B2OC(C)(C)C(C)(C)O2)[CH:44]=[N:43]1)(C)(C)C.P([O-])([O-])([O-])=O.[K+].[K+].[K+]>O.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].O1CCOCC1>[CH3:21][O:20][C:14]1[CH:13]=[C:12]([CH2:11][CH2:10][C:8]2[N:9]=[C:4]3[CH:3]=[C:2]([C:45]4[CH:44]=[N:43][N:42]([CH2:41][C:40]([OH:56])=[O:39])[CH:46]=4)[N:22]([S:23]([C:26]4[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=4)(=[O:25])=[O:24])[C:5]3=[N:6][CH:7]=2)[CH:17]=[C:16]([O:18][CH3:19])[CH:15]=1

Participants

8

Reactant 4

HCID 6344DichloromethaneHCID 62657Potassium Phosphate, TribasicHCID 59216326tert-Butyl 2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl)acetateHCID 899637236-bromo-2-[2-(3,5-dimethoxyphenyl)ethyl]-5-(phenylsulfonyl)-5H-pyrrolo[2,3-b]pyrazine

Product 1

HCID 89963529{4-[2-[2-(3,5-dimethoxyphenyl)ethyl]-5-(phenylsulfonyl)-5H-pyrrolo[2,3-b]pyrazin-6-yl]-1H-pyrazol-1-yl}acetic acidYield 92%

Reagents, catalysts & solvents 3

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
88 °C

Procedure

A stirred mixture of 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), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) complexed with dichloromethane (1:1) (3.25 mg, 3.98 μmol), tert-butyl[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl]acetate (24.5 mg, 79.6 μmol), and potassium phosphate (33.8 mg, 0.159 mmol) in water (0.5 mL)/1,4-dioxane (1.0 mL) was heated at 88° C. After 1 hour, the reaction was quenched with saturated aqueous NH4Cl, extracted with methylene chloride. The combined organic layers were dried over MgSO4, and then concentrated. The residue was dissolved in methylene chloride (1 mL) and trifluoroacetic acid (1 mL) was added at ambient temperature. After 2 hours, the volatiles were removed under vacuum to afford the desired product (40 mg, 92%). LCMS calculated for C27H26N5O6S (M+H)+: m/z=548.2. Found: 548.2.

Workup

  1. customthe reaction was quenched with saturated aqueous 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 methylene chloride (1 mL)
  6. additiontrifluoroacetic acid (1 mL) was added at ambient temperature
  7. waitAfter 2 hours
  8. customthe volatiles were removed under vacuum

Sources & evidence

ORD record
ord-fa87fb21575f41c99c653f3fcbab96db
Source dataset
uspto-grants-2016_07
Patent number
US09388185B2

Reaction notes

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