Diisopropylethylamine → N-(5-Bromo-4-fluoro-2-nitrophenyl)-1-(tetrahydro-2H-pyran-4-yl)-4-piperidinamine

HRID 2064182

Reaction equation

[Br:1][C:2]1[C:7]([F:8])=[CH:6][C:5]([N+:9]([O-:11])=[O:10])=[C:4](F)[CH:3]=1.Cl.Cl.[O:15]1[CH2:20][CH2:19][CH:18]([N:21]2[CH2:26][CH2:25][CH:24]([NH2:27])[CH2:23][CH2:22]2)[CH2:17][CH2:16]1.C(N(C(C)C)CC)(C)C>CN(C)C=O>[Br:1][C:2]1[C:7]([F:8])=[CH:6][C:5]([N+:9]([O-:11])=[O:10])=[C:4]([NH:27][CH:24]2[CH2:23][CH2:22][N:21]([CH:18]3[CH2:19][CH2:20][O:15][CH2:16][CH2:17]3)[CH2:26][CH2:25]2)[CH:3]=1

Participants

Conditions

Temperature: 200 °C

Procedure

A mixture of 4-bromo-2,5-difluoro-1-nitrobenzene (1 g, 4.2 mmol), 1-(tetrahydro-2H-pyran-4yl)piperidin-4-amine dihydrochloride salt (D40, 1.08 g, 4.2 mmol), and di-iso-propylethylamine (2.2 ml, 1.26 mmol) in dimethylformamide (10 ml) was heated in microwave reactor for 5 min at 200° C. The mixture was washed with water, then extracted with dichloromethane and the extract dried over MgSO4 and concentrated under vacuum. The crude material was purified on silica column (100 g of silica, ethyl acetate/methanol: 1.0% to 0%, 3CV; 2.0% to 100% 2CV 3. 100% to 100% 5CV) to leave 1.82 g (96%) of a mixture of title compound and an unknown impurity (˜3:1 by HPLC).

Workup

washThe mixture was washed with water
extractionextracted with dichloromethane
dry with materialthe extract dried over MgSO4
concentrationconcentrated under vacuum
customThe crude material was purified on silica column (100 g of silica, ethyl acetate/methanol: 1.0% to 0%, 3CV; 2.0% to 100% 2CV 3. 100% to 100% 5CV)

Sources & evidence

ORD record: ord-afd837f064b7470e8672d0888b02859a
Source dataset: uspto-grants-2012_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08288412B2

Linked notes

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