P-Cresol → 5-(4-methylphenoxy)-1H-indole

HRID 2087240Notes

Reaction equation

Br[C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][CH:6]=[CH:5]2.[CH:11]1[C:16]([OH:17])=[CH:15][CH:14]=[C:13]([CH3:18])[CH:12]=1.C([O-])([O-])=O.[K+].[K+].CN(C=O)C>O>[CH3:18][C:13]1[CH:12]=[CH:11][C:16]([O:17][C:2]2[CH:3]=[C:4]3[C:8](=[CH:9][CH:10]=2)[NH:7][CH:6]=[CH:5]3)=[CH:15][CH:14]=1

Participants

Conditions

Temperature: 160 °C

Procedure

A mixture of 5-bromo-1H-indole (98.0 mg, 0.500 mmol), p-cresol (108 mg, 1.00 mmol), Cu (32.0 mg, 0.500 mmol), K2CO3 (138 mg, 1.00 mL) and DMF (1.00 mL) was heated at 160° C. for 12 h. The resulting crude mixture was diluted with water (40 mL), the aqueous layer was extracted with CH2Cl2 (3×20 mL). The combined organic layers were washed with brine (30 mL), dried over Na2SO4, filtered, and concentrated in vacuo. The residue was purified by preparative TLC using hexane:EtOAc (4:1) to give the desired product 5-(4-methylphenoxy)-1H-indole (57.5 mg, 51.5%): ESMS m/e: 224.0 (M+H)+.

Workup

extractionthe aqueous layer was extracted with CH2Cl2 (3×20 mL)
washThe combined organic layers were washed with brine (30 mL)
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated in vacuo
customThe residue was purified by preparative TLC

Sources & evidence

ORD record: ord-39d2d0ce7d904560ab8603c8071a54b0
Source dataset: uspto-grants-2004_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06727264B1

Reaction notes

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