tert-butyl (Z)-4-[4-(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)but-3-enyl]piperazine-1-carboxylate → HCID 178487165, compound

HRID 1749955Notes

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/[CH:13]=[CH:14]\[CH2:15][CH2:16][N:17]1[CH2:22][CH2:21][N:20]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[CH2:19][CH2:18]1.[NH:30]1[C:38]2[C:33](=[CH:34][CH:35]=[CH:36][CH:37]=2)[C:32]([CH:39]=O)=[N:31]1>CO.N1CCCCC1>[NH:30]1[C:38]2[C:33](=[CH:34][CH:35]=[CH:36][CH:37]=2)[C:32](/[CH:39]=[C:8]2\[O:9][C:5]3[C:4](/[CH:13]=[CH:14]\[CH2:15][CH2:16][N:17]4[CH2:22][CH2:21][N:20]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[CH2:19][CH2:18]4)=[C:3]([O:2][CH3:1])[CH:12]=[CH:11][C:6]=3[C:7]\2=[O:10])=[N:31]1

Participants

Conditions

Temperature: 60 °C

Procedure

A solution of tert-butyl (Z)-4-[4-(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)but-3-enyl]piperazine1-carboxylate (0.0562 g, 0.139 mmol) in methanol (5 mL) was added with 1H-indazole-3-carboxaldehyde (0.0203 g, 0.139 mmol) and piperidine (7 drops), and the mixture was stirred at 60° C. for 2 hours. The reaction mixture was concentrated, and then the residue was purified by silica gel column chromatography (chloroform/methanol) to obtain tert-butyl 4-((Z)-4-{(Z)-2-[(1H-indazol-3-yl)methylene]-6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl}but-3-enyl)piperazine-1-carboxylate (0.0672 g, 91%).

Workup

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

Sources & evidence

ORD record: ord-4d244dd18e58432bae1c515d9a4fe4d0
Source dataset: uspto-grants-2015_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09156827B2

Reaction notes

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