p-Toluenesulfonic acid monohydrate → 1-[4-(benzyloxy)phenyl]-1,3-dihydro-2H-pyrrolo[2,3-b]pyridin-2-one

HRID 587440Notes

Reaction equation

Cl.[CH2:2]([O:9][C:10]1[CH:16]=[CH:15][C:13]([NH2:14])=[CH:12][CH:11]=1)[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.O.CC1C=CC(S(O)(=O)=O)=CC=1.Cl[C:30]1[C:35]([CH2:36][C:37](O)=[O:38])=[CH:34][CH:33]=[CH:32][N:31]=1>C(O)CCCC>[CH2:2]([O:9][C:10]1[CH:11]=[CH:12][C:13]([N:14]2[C:30]3=[N:31][CH:32]=[CH:33][CH:34]=[C:35]3[CH2:36][C:37]2=[O:38])=[CH:15][CH:16]=1)[C:3]1[CH:4]=[CH:5][CH:6]=[CH:7][CH:8]=1

Participants

Conditions

Temperature: 140 °C

Procedure

A mixture of 4-(benzyloxy)aniline hydrochloride (2.21 g), 4-methylbenzenesulfonic acid hydrate (0.178 g), and (2-chloropyridin-3-yl)acetic acid (Journal of Medicinal Chemistry, 1990, 33, 2697-2706.) (1.61 g) in 1-pentanol (15 mL) was stirred at 140° C. for 24 h. After cooling to room temperature, the mixture was added to SiO2, and the mixture was concentrated and purified by column chromatography (silica gel, eluted with 0%-50% EtOAc in hexane) to give 1-[4-(benzyloxy)phenyl]-1,3-dihydro-2H-pyrrolo[2,3-b]pyridin-2-one (1.39 g) as a pale yellow solid.

Workup

temperatureAfter cooling to room temperature
additionthe mixture was added to SiO2
concentrationthe mixture was concentrated
custompurified by column chromatography (silica gel, eluted with 0%-50% EtOAc in hexane)

Sources & evidence

ORD record: ord-4143628f0b924383a3f1a47d19e8f7b5
Source dataset: uspto-grants-2016_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09226921B2

Reaction notes

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