Cycloheptanone → HCID 66743831, compound

HRID 2363969Notes

Reaction equation

[NH2:1][C:2]1[CH:6]=[C:5]([C:7]2[CH:12]=[CH:11][N:10]=[CH:9][CH:8]=2)[S:4][C:3]=1[C:13]([NH2:15])=[O:14].[C:16]1(=O)[CH2:22][CH2:21][CH2:20][CH2:19][CH2:18][CH2:17]1.O.C1(C)C=CC(S(O)(=O)=O)=CC=1.C(=O)([O-])O.[Na+]>C(O)(=O)C>[N:10]1[CH:9]=[CH:8][C:7]([C:5]2[S:4][C:3]3[C:13](=[O:14])[NH:15][C:16]4([CH2:22][CH2:21][CH2:20][CH2:19][CH2:18][CH2:17]4)[NH:1][C:2]=3[CH:6]=2)=[CH:12][CH:11]=1

Participants

Conditions

Temperature: 110 °C

Procedure

A mixture of 3-amino-5-(pyridin-4-yl)thiophene-2-carboxamide (0.108 g, 0.500 mmol), cycloheptanone (1.0 mL), p-toluenesulfonic acid monohydrate (0.0095 g, 0.050 mmol) and acetic acid (2.0 mL) was stirred for 2 h at 110° C. in a sealed tube. Then, this mixture was poured into sat. aqueous sodium hydrogen carbonate. Extraction with ethyl acetate, washing with brine, drying over magnesium sulfate, filtration and concentration at reduced pressure were carried out. This residue was purified by column chromatography (Combiflash, 12 g silica gel, dichloromethane to 90:10 dichloromethane/methanol), then recrystallized from methanol-ethyl acetate and the crystals were collected by filtration to afford the title compound (0.0226 g, 14%) as a yellow solid:

Workup

extractionExtraction with ethyl acetate
washwashing with brine
dry with materialdrying over magnesium sulfate, filtration and concentration at reduced pressure
customThis residue was purified by column chromatography (Combiflash, 12 g silica gel, dichloromethane to 90:10 dichloromethane/methanol)
customrecrystallized from methanol-ethyl acetate
filtrationthe crystals were collected by filtration

Sources & evidence

ORD record: ord-58ba5d9900e343eead0484373b22405a
Source dataset: uspto-grants-2014_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08691828B2

Reaction notes

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