Ethylamine → HCID 20063305, compound
Reaction equation
[CH2:1](N)C.Cl[C:5]1[C:14]([C:15]([C:17](=[CH:23][N:24](C)[CH3:25])[C:18]([O:20][CH2:21][CH3:22])=[O:19])=[O:16])=[CH:13][C:12]2[C:7](=[C:8]([F:29])[C:9]([F:28])=[C:10]([F:27])[CH:11]=2)[N:6]=1.N12CCCN=C1CCCCC2>C(O)C>[CH2:21]([O:20][C:18]([C:17]1[C:15](=[O:16])[C:14]2[CH:13]=[C:12]3[CH:11]=[C:10]([F:27])[C:9]([F:28])=[C:8]([F:29])[C:7]3=[N:6][C:5]=2[N:24]([CH2:25][CH3:1])[CH:23]=1)=[O:19])[CH3:22]Participants
Procedure
4.5 g of ethylamine are added in the course of 10 minutes, at between 5° and 10° C., to a stirred suspension of 7.1 g of ethyl 2-(2-chloro-6,7,8-trifluoroquinoline-3-carbonyl)-3-dimethylaminoacrylate in 100 cm3 of ethanol kept at a temperature close to 5° C., the mixture is stirred for 1 hour at between 5° and 10° C. and the temperature is allowed to rise to about 20° C. 4 g of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) are added to the solution obtained and the mixture is heated at a temperature close to 75° C. for 1 hour and a half. After cooling to a temperature close to 20° C., the product is drained and washed with twice 30 cm3 of ethanol and twice 50 cm3 of diisopropyl ether. 4 g of 3-ethoxycarbonyl-1-ethyl-7,8,9-tri fluoro-4-oxo-1,4-dihydro-benzo[b][1,8]naphthyridine are obtained in the form of a cream solid melting at 284° C., which is used for the subsequent steps without further purification.
Workup
- customclose to 5° C.
- customto rise to about 20° C
- customobtained
- temperaturethe mixture is heated at a temperature
- customclose to 75° C. for 1 hour
- temperatureAfter cooling to a temperature
- customclose to 20° C.
- washwashed with twice 30 cm3 of ethanol and twice 50 cm3 of diisopropyl ether
Sources & evidence
- ORD record
- ord-d055548eee4f4e28bdeb02093c0066b2
- Source dataset
- uspto-grants-1990_11
- Patent number
- US04970213
Reaction notes
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