1-Chloroethyl chloroformate → 2-chloro-N-methyl-N-(1-methylethyl)-6,7,8,9-tetrahydropyrazino[2,3-f][1,4]oxazepin-3-amine hydrochloride
Reaction equation
C([N:8]1[CH2:14][C:13]2[N:15]=[C:16]([Cl:24])[C:17]([N:19]([CH3:23])[CH:20]([CH3:22])[CH3:21])=[N:18][C:12]=2[O:11][CH2:10][CH2:9]1)C1C=CC=CC=1.ClC(OC(Cl)C)=O>C1(C)C=CC=CC=1>[ClH:24].[Cl:24][C:16]1[C:17]([N:19]([CH3:23])[CH:20]([CH3:21])[CH3:22])=[N:18][C:12]2[O:11][CH2:10][CH2:9][NH:8][CH2:14][C:13]=2[N:15]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 80 °C
Procedure
To a solution of 8-benzyl-2-chloro-N-methyl-N-(1-methylethyl)-6,7,8,9-tetrahydropyrazino[2,3-f][1,4]oxazepin-3-amine (200 mg) in toluene (3 mL) was added 1-chloroethyl chloroformate (0.075 mL), and the mixture was stirred at 80° C. for 2 hr. The reaction mixture was cooled to room temperature, and concentrated. To the obtained residue was added methanol (3 ml) and the mixture was stirred at 80° C. for 1 hr. The reaction mixture was cooled to room temperature, and concentrated. The obtained residue was purified by recrystallization (methanol-diisopropyl ether) to give the title compound (102 mg, 60%) as pale-yellow crystals.
Workup
- temperatureThe reaction mixture was cooled to room temperature
- concentrationconcentrated
- additionTo the obtained residue was added methanol (3 ml)
- stirringthe mixture was stirred at 80° C. for 1 hr
- temperatureThe reaction mixture was cooled to room temperature
- concentrationconcentrated
- customThe obtained residue was purified by recrystallization (methanol-diisopropyl ether)
Sources & evidence
- ORD record
- ord-df928cc7bc284006a22ca96383a9886e
- Source dataset
- uspto-grants-2012_11
- Patent number
- US08318722B2
Reaction notes
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