Tert-butyl 4-[3-(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)propyl]piperidine-1-carboxylate → HCID 178487146, compound

HRID 1749984Notes

Reaction equation

[CH3:1][O:2][C:3]1[CH:12]=[CH:11][C:6]2[C:7](=[O:10])[CH2:8][O:9][C:5]=2[C:4]=1[CH2:13][CH2:14][CH2:15][CH:16]1[CH2:21][CH2:20][N:19]([C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])[CH2:18][CH2:17]1.[NH:29]1[C:37]2[C:32](=[CH:33][CH:34]=[CH:35][CH:36]=2)[C:31]([CH:38]=O)=[N:30]1>CO.N1CCCCC1>[NH:29]1[C:37]2[C:32](=[CH:33][CH:34]=[CH:35][CH:36]=2)[C:31](/[CH:38]=[C:8]2\[O:9][C:5]3[C:4]([CH2:13][CH2:14][CH2:15][CH:16]4[CH2:21][CH2:20][N:19]([C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])[CH2:18][CH2:17]4)=[C:3]([O:2][CH3:1])[CH:12]=[CH:11][C:6]=3[C:7]\2=[O:10])=[N:30]1

Participants

Conditions

Temperature: 60 °C

Procedure

A solution of tert-butyl 4-[3-(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)propyl]piperidine-1-carboxylate (0.0330 g, 0.0847 mmol) in methanol (3 mL) was added with 1H-indazole-3-carboxaldehyde (0.0124 g, 0.0847 mmol) and piperidine (5 drops), and the mixture was stirred at 60° C. for 2 hours. The reaction mixture was concentrated, and the resulting residue was subjected to silica gel column chromatography (chloroform/methanol). The resulting crude product was further purified by silica gel column chromatography (hexane/ethyl acetate) to obtain tert-butyl (Z)-4-(3-{2-[(1H-indazol-3-yl)methylene]-6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl}propyl)piperidine-1-carboxylate (0.0313 g, 71%).

Workup

concentrationThe reaction mixture was concentrated
customThe resulting crude product was further purified by silica gel column chromatography (hexane/ethyl acetate)

Sources & evidence

ORD record: ord-da30d64df5b0489d950b7ed5af6aa4c5
Source dataset: uspto-grants-2015_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09156827B2

Reaction notes

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