Tert-butyl 4-[(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)ethynyl]piperidine-1-carboxylate → HCID 178487114, compound

HRID 1749968Notes

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

Participants

Conditions

Temperature: 60 °C

Procedure

A solution of tert-butyl 4-[(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)ethynyl]piperidine-1-carboxylate (0.103 g, 0.277 mmol) in methanol (5 mL) was added with 1H-indazole-3-carboxaldehyde (0.0386 g, 0.264 mmol) and piperidine (7 drops), and the mixture was stirred at 60° C. for 2 hours. The reaction mixture was concentrated, and the resulting residue was purified by silica gel column chromatography (chloroform/methanol) to obtain tert-butyl (Z)-4-({2-[(1H-indazol-3-yl)methylene]-6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl}ethynyl)piperidine-1-carboxylate (0.105 g, 80%).

Workup

concentrationThe reaction mixture was concentrated
customthe resulting residue was purified by silica gel column chromatography (chloroform/methanol)

Sources & evidence

ORD record: ord-11c87464c5404297a5c73210ea87fcdc
Source dataset: uspto-grants-2015_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09156827B2

Reaction notes

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