Ethylene Glycol → 3-(3-phenylsulfanyl-1H-pyrrolo[2,3-b]pyridine-5-yl)-phenol

HRID 901525Notes

Reaction equation

HRID 901525 reaction equation
I[C:2]1[C:10]2[C:5](=[N:6][CH:7]=[C:8]([C:11]3[CH:12]=[C:13]([O:17]S(C4C=CC(C)=CC=4)(=O)=O)[CH:14]=[CH:15][CH:16]=3)[CH:9]=2)[N:4](S(C2C=CC(C)=CC=2)(=O)=O)[CH:3]=1.C(=O)([O-])[O-].[K+].[K+].[C:44]1([SH:50])[CH:49]=[CH:48][CH:47]=[CH:46][CH:45]=1.C(O)CO.[OH-].[K+].Cl>[Cu]I.C(O)(C)C>[C:44]1([S:50][C:2]2[C:10]3[C:5](=[N:6][CH:7]=[C:8]([C:11]4[CH:12]=[C:13]([OH:17])[CH:14]=[CH:15][CH:16]=4)[CH:9]=3)[NH:4][CH:3]=2)[CH:49]=[CH:48][CH:47]=[CH:46][CH:45]=1

Participants

9

Reactant 6

HCID 174Ethylene GlycolHCID 313Hydrochloric AcidHCID 7969ThiophenolHCID 11430Potassium CarbonateHCID 14797Potassium HydroxideHCID 59699703toluene-4-sulfonic acid 3-[3-iodo-1-(toluene-4-sulfonyl)-1H-pyrrolo[2,3-b]pyridine-5-yl]-phenyl ester

Product 1

HCID 160391543-(3-phenylsulfanyl-1H-pyrrolo[2,3-b]pyridine-5-yl)-phenolYield 17.5%

Reagents, catalysts & solvents 2

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 3776IsopropanolSolvent

Conditions

Temperature
80 °C

Procedure

To toluene-4-sulfonic acid 3-[3-iodo-1-(toluene-4-sulfonyl)-1H-pyrrolo[2,3-b]pyridine-5-yl]-phenyl ester (50 mg, 0.077 mmol), copper(I) iodide (1.5 mg, 0.004 mmol), and potassium carbonate (16 mg, 0.155 mmol) under nitrogen atmosphere was added isopropanol (0.2 mL), benzenethiol (8 μL, 0.077 mmol), and ethylene glycol (9 uL, 0.155 mmol). The reaction mixture was stirred at 80° C. for 24 h. A (1:1) mixture of 2 M aqueous KOH and MeOh (1 mL) was added, and the reaction mixture was further stirred at 50° C. for 3 h. The mixture was acidified to pH5 with 1N aqueous HCl and extracted with EtOAc twice. Extracts were combined and concentrated under vacuum. Purification by reverse phase chromatography using a gradient of H2O and acetonitrile (with 0.1% formic acid as a modifier) afforded 3-(3-phenylsulfanyl-1H-pyrrolo[2,3-b]pyridine-5-yl)-phenol as a white solid (4.3 mg, 17% yield). 1H NMR (500 MHz, DMSO-d6) δ 6.74 (dd, J=2.5, 9.0 Hz, 1H), 6.98 (t, J=2.0 Hz, 1H), 7.08 (m, 4H), 7.23 (m, 3H), 7.85 (d, J=2.5 Hz, 1H), 7.98 (s, 1H), 8.56 (d, J=2.0 Hz, 1H), 9.55 (broad s, 1H), 12.4 (broad s, 1H). MS: m/z 319 (M+H+).

Workup

  1. additionwas added
  2. stirringthe reaction mixture was further stirred at 50° C. for 3 h
  3. extractionextracted with EtOAc twice
  4. concentrationconcentrated under vacuum
  5. customPurification by reverse phase chromatography

Sources & evidence

ORD record
ord-67cf8ae26179413b98342bb64f21e2ca
Source dataset
uspto-grants-2008_04
Patent number
US07361764B2

Reaction notes

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