Triethylamine → 2-(2,6-difluorophenyl)-4-(4-chlorophenyl)-5,6-dihydro-4H-1,3-oxazine
Reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]([NH2:12])[CH2:9][CH2:10][OH:11])=[CH:4][CH:3]=1.C(N(CC)CC)C.[F:20][C:21]1[CH:29]=[CH:28][CH:27]=[C:26]([F:30])[C:22]=1[C:23](Cl)=O>O1CCCC1>[F:20][C:21]1[CH:29]=[CH:28][CH:27]=[C:26]([F:30])[C:22]=1[C:23]1[O:11][CH2:10][CH2:9][CH:8]([C:5]2[CH:4]=[CH:3][C:2]([Cl:1])=[CH:7][CH:6]=2)[N:12]=1Participants
Procedure
To a solution of 0.9 g of 3-(4-chlorophenyl)-3-amino-1-propanol, 0.5 g of triethylamine in 10 ml of tetrahydrofuran at 0° C., was added dropwise 0.8 g of 2,6-difluorobenzoyl chloride. The reaction mixture was stirred at room temperature for 5 hours. The precipitated solid was filtered off and the filtrate was concentrated under reduced pressure. To the residue, there was added 20 ml of tetrahydrofuran and 2.4 g of triphenylphosphine and further added 2.0 g of diisopropyl azodicarboxylate. The reaction mixture was stirred at room temperature for 12 hours and concentrated under reduced pressure. The residue was subjected to silica gel chromatography to afford 0.5 g of 2-(2,6-difluorophenyl)-4-(4-chlorophenyl)-5,6-dihydro-4H-1,3-oxazine. ND23.2 1.5532
Workup
- filtrationThe precipitated solid was filtered off
- concentrationthe filtrate was concentrated under reduced pressure
- additionTo the residue, there was added 20 ml of tetrahydrofuran and 2.4 g of triphenylphosphine and further added 2.0 g of diisopropyl azodicarboxylate
- stirringThe reaction mixture was stirred at room temperature for 12 hours
- concentrationconcentrated under reduced pressure
Sources & evidence
- ORD record
- ord-799a71b1a8f84c518618ef4d68cd812e
- Source dataset
- uspto-grants-1998_06
- Patent number
- US05760033
Reaction notes
Loading…