Triethylamine → methyl5,6-dihydro-5-oxo-11-H-indeno[1,2-c]isoquinoline-10-carboxylate
Reaction equation
Br[CH2:2][C:3]1[C:12]([C:13]#[N:14])=[CH:11][CH:10]=[CH:9][C:4]=1[C:5]([O:7][CH3:8])=[O:6].C1(=O)O[C:19](=[O:20])[C:18]2=[CH:22][CH:23]=[CH:24][CH:25]=[C:17]2[CH2:16]1.C(N(CC)CC)C>C(#N)C>[O:20]=[C:19]1[C:18]2[C:17](=[CH:25][CH:24]=[CH:23][CH:22]=2)[C:16]2[CH2:2][C:3]3[C:4]([C:5]([O:7][CH3:8])=[O:6])=[CH:9][CH:10]=[CH:11][C:12]=3[C:13]=2[NH:14]1Participants
Procedure
A mixture of methyl 2-bromomethyl-3-cyanobenzoate (14.1 g, 55.5 mmol) and homophthalic anhydride (22.5 g, 138.8 mmol) in acetonitrile (150 mL) was stirred at room temperature. A solution of triethylamine (23.2 mL) in acetonitrile (100 mL) was added dropwise over the period of 1 hour. After the completion of addition, the resultant suspension was refluxed for 4 hours. The reaction mixture was then cooled to room temperature and filtered. The resultant solid was washed thoroughly with acetonitrile (100 mL) and ethanol (2×100 mL) and dried in vacuum oven at 50° C. to provide methyl 5,6-dihydro-5-oxo-11-H-indeno[1,2-c]isoquinoline-10-carboxylate was obtained in 81% yield (13.1 g). 1H NMR spectrum (in DMSO-d6): δ 12.21 (s, 1H); 8.20 (m, 2H); 7.83 (d, J=7.5 Hz, 1H); 7.71 (m, 2H); 7.47 (m, 2H); 4.07 (s, 2H); 3.89 (s, 3H).
Workup
- additionAfter the completion of addition
- temperatureThe reaction mixture was then cooled to room temperature
- filtrationfiltered
- washThe resultant solid was washed thoroughly with acetonitrile (100 mL) and ethanol (2×100 mL)
- customdried in vacuum oven at 50° C.
Sources & evidence
- ORD record
- ord-82260941896c4961bad159bfc6ae7c07
- Source dataset
- uspto-grants-2012_02
- Patent number
- US08119654B2
Reaction notes
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