1,8-Diazabicyclo(5.4.0)undec-7-ene → 3-(5-amino-2-chloro-4-fluorophenyl)-1-ethyl-7-(1-methylpiperidin-4-ylamino)-1,6-naphthyridin-2(1H)-one

HRID 1257213Notes

Reaction equation

[NH2:1][C:2]1[C:3]([F:23])=[CH:4][C:5]([Cl:22])=[C:6]([C:8]2[C:9](=[O:21])[N:10]([CH2:19][CH3:20])[C:11]3[C:16]([CH:17]=2)=[CH:15][N:14]=[C:13](Cl)[CH:12]=3)[CH:7]=1.[CH3:24][N:25]1[CH2:30][CH2:29][CH:28]([NH2:31])[CH2:27][CH2:26]1.C1CCN2C(=NCCC2)CC1>CN1C(=O)CCC1>[NH2:1][C:2]1[C:3]([F:23])=[CH:4][C:5]([Cl:22])=[C:6]([C:8]2[C:9](=[O:21])[N:10]([CH2:19][CH3:20])[C:11]3[C:16]([CH:17]=2)=[CH:15][N:14]=[C:13]([NH:31][CH:28]2[CH2:29][CH2:30][N:25]([CH3:24])[CH2:26][CH2:27]2)[CH:12]=3)[CH:7]=1

Participants

Conditions

Temperature: 180 °C

Procedure

To a solution of Example A3 (2.1 g, 5.96 mmol) in NMP (10 mL) was added 1-methyl-piperidin-4-ylamine (1.36 g, 11.9 mmol) and DBU (1.7 g, 11.4 mmol). Nitrogen was bubbled through the mixture for 5 min and then it was heated at 180° C. for 12 h. The reaction mixture was cooled to RT, poured into water and extracted with EtOAc (3×). The combined organics were washed with brine, dried over Na2SO4, concentrated under reduced pressure, and the residue was purified by silica gel chromatography to yield 3-(5-amino-2-chloro-4-fluorophenyl)-1-ethyl-7-(1-methylpiperidin-4-ylamino)-1,6-naphthyridin-2(1H)-one (0.50 g, 19.5% yield) which was 70% pure (30% de-methylated by-product) and used without further purification.

Workup

customNitrogen was bubbled through the mixture for 5 min
temperatureThe reaction mixture was cooled to RT
additionpoured into water
extractionextracted with EtOAc (3×)
washThe combined organics were washed with brine
dry with materialdried over Na2SO4
concentrationconcentrated under reduced pressure
customthe residue was purified by silica gel chromatography

Sources & evidence

ORD record: ord-e4c5be43dae74c4da6ddbd021b4bb63a
Source dataset: uspto-grants-2013_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08461179B1

Reaction notes

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