Toluene → HCID 178437259, compound

HRID 1749862Notes

Reaction equation

[OH:1][C:2]1[CH:11]=[CH:10][C:5]2[C:6](=[O:9])[CH2:7][O:8][C:4]=2[C:3]=1[CH:12]([N:14]1[CH2:19][CH2:18][N:17]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:16][CH2:15]1)[CH3:13].[NH:27]1[C:35]2[C:30](=[CH:31][CH:32]=[CH:33][CH:34]=2)[C:29]([CH:36]=O)=[N:28]1.C1(C)C=CC=CC=1>CO.N1CCCCC1>[NH:27]1[C:35]2[C:30](=[CH:31][CH:32]=[CH:33][CH:34]=2)[C:29](/[CH:36]=[C:7]2\[O:8][C:4]3[C:3]([CH:12]([N:14]4[CH2:15][CH2:16][N:17]([C:20]([O:22][C:23]([CH3:25])([CH3:24])[CH3:26])=[O:21])[CH2:18][CH2:19]4)[CH3:13])=[C:2]([OH:1])[CH:11]=[CH:10][C:5]=3[C:6]\2=[O:9])=[N:28]1

Participants

Conditions

Temperature: 50 °C

Procedure

A solution of tert-butyl 4-[1-(6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl)ethyl]piperazine-1-carboxylate (0.11 g, 0.30 mmol) in methanol (5.0 mL) was added with 1H-indazole-3-carboxaldehyde (0.040 g, 0.27 mmol). Then, the mixture was added with 7 drops of piperidine, and the mixture was stirred at 50° C. for 1 hour. The reaction mixture was added with toluene, then the solvent was evaporated under reduced pressure, and the residue was subjected to silica gel column chromatography (aminopropyl silica was used, eluted with chloroform/methanol (95:5)) to obtain tert-butyl (Z)-4-{1-[2-(1H-indazol-3-yl)methylene-6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl]ethyl}piperazine-1-carboxylate (0.075 g, 51%).

Workup

customthe solvent was evaporated under reduced pressure
washthe residue was subjected to silica gel column chromatography (aminopropyl silica was used, eluted with chloroform/methanol (95:5))

Sources & evidence

ORD record: ord-2264cb1e967e4fa7b4f0d357b53a171e
Source dataset: uspto-grants-2015_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09156827B2

Reaction notes

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