Cyclobutanecarboxylic acid → Methyl 2-(4-(cyclobutanecarboxamido)phenyl)-3,3-dimethyl-1,2,3,4-tetrahydroquinoline-6-carboxylate

HRID 1801352Notes

Reaction equation

HRID 1801352 reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[C:17]([CH3:19])([CH3:18])[CH2:16][C:15]3[C:10](=[CH:11][CH:12]=[C:13]([C:20]([O:22][CH3:23])=[O:21])[CH:14]=3)[NH:9]2)=[CH:4][CH:3]=1.[CH:24]1([C:28](O)=[O:29])[CH2:27][CH2:26][CH2:25]1.C(N(CC)C(C)C)(C)C.P(Cl)(Cl)(Cl)=O>ClCCl>[CH:24]1([C:28]([NH:1][C:2]2[CH:3]=[CH:4][C:5]([CH:8]3[C:17]([CH3:18])([CH3:19])[CH2:16][C:15]4[C:10](=[CH:11][CH:12]=[C:13]([C:20]([O:22][CH3:23])=[O:21])[CH:14]=4)[NH:9]3)=[CH:6][CH:7]=2)=[O:29])[CH2:27][CH2:26][CH2:25]1

Participants

6

Reactant 4

HCID 19494Cyclobutanecarboxylic acidHCID 24813Phosphorus oxychlorideHCID 81531DiisopropylethylamineHCID 67441380Methyl 2-(4-aminophenyl)-3,3-dimethyl-1,2,3,4-tetrahydroquinoline-6-carboxylate

Product 1

HCID 67439894Methyl 2-(4-(cyclobutanecarboxamido)phenyl)-3,3-dimethyl-1,2,3,4-tetrahydroquinoline-6-carboxylateYield 67%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of methyl 2-(4-aminophenyl)-3,3-dimethyl-1,2,3,4-tetrahydroquinoline-6-carboxylate (50 mg, 0.16 mmol), cyclobutanecarboxylic acid (0.025 mL, 0.24 mmol) and N,N-diisopropylethylamine (0.05 mL, 0.32 mmol) in dichloromethane (5 mL) was added phosphorus oxychloride (0.02 mL, 0.24 mmol) via syringe below 0° C. The mixture was stirred at room temperature for 16 hrs under nitrogen. The solvent was removed and the residue was washed with dichloromethane/petroleum ether, the precipitate was collected to afford methyl 2-(4-(cyclobutane carboxamido)phenyl)-3,3-dimethyl-1,2,3,4-tetrahydroquinoline-6-carboxylate as a yellow solid, 42 mg, yield: 67%.

Workup

  1. customThe solvent was removed
  2. washthe residue was washed with dichloromethane/petroleum ether
  3. customthe precipitate was collected

Sources & evidence

ORD record
ord-00033a50c9da4ac2bf087a9ada9c216b
Source dataset
uspto-grants-2013_01
Patent number
US08344137B2

Reaction notes

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