Trifluoroacetic acid → Methyl 2-(3-(benzyloxycarbonyl)phenyl)-3,3-dimethyl-1,2,3,4-tetrahydroquinoline-8-carboxylate

HRID 1801371Notes

Reaction equation

HRID 1801371 reaction equation
[CH2:1]([O:8][C:9]([C:11]1[CH:12]=[C:13]([CH:17]2[C:26]([CH3:28])([CH3:27])[CH:25](O)[C:24]3[C:19](=[C:20]([C:30]([O:32][CH3:33])=[O:31])[CH:21]=[CH:22][CH:23]=3)[NH:18]2)[CH:14]=[CH:15][CH:16]=1)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([SiH](CC)CC)C.FC(F)(F)C(O)=O.C(=O)([O-])[O-].[Na+].[Na+]>ClCCl.C(OCC)(=O)C>[CH2:1]([O:8][C:9]([C:11]1[CH:12]=[C:13]([CH:17]2[C:26]([CH3:28])([CH3:27])[CH2:25][C:24]3[C:19](=[C:20]([C:30]([O:32][CH3:33])=[O:31])[CH:21]=[CH:22][CH:23]=3)[NH:18]2)[CH:14]=[CH:15][CH:16]=1)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

7

Reactant 4

HCID 6422Trifluoroacetic acidHCID 10340Sodium CarbonateHCID 12052TriethylsilaneHCID 67443442Methyl 2-(3-(benzyloxycarbonyl)phenyl)-4-hydroxy-3,3-dimethyl-1,2,3,4-tetrahydroquinoline-8-carboxylate

Product 1

HCID 67441263Methyl 2-(3-(benzyloxycarbonyl)phenyl)-3,3-dimethyl-1,2,3,4-tetrahydroquinoline-8-carboxylateYield 39.6%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of methyl 2-(3-(benzyloxycarbonyl)phenyl)-4-hydroxy-3,3-dimethyl-1,2,3,4-tetrahydroquinoline-8-carboxylate (0.66 g, 1.49 mmol), triethylsilane (0.5 g, 4.3 mmol) in dichloro methane (10 mL) was added a solution of trifluoroacetic acid (0.69 g, 6.1 mmol), which was placed in a drop funnel, under nitrogen with ice cooling. Upon completion of addition, the resulting mixture was allowed to warm back to room temperature naturally overnight. Thin layer chromatography (petroleum ether: ethyl acetate=20:1) showed the reaction was complete. The reaction mixture was basified with solid sodium carbonate to pH=6 and filtered. The filtrate was concentrated in vacuo and the residual was purified by column chromatography (petroleum ether: ethyl acetate=25:1) to give 109 mg of methyl 2-(3-(benzyloxycarbonyl)phenyl)-3,3-dimethyl-1,2,3,4-tetrahydroquinoline-8-carboxylate as a off-yellow solid, yield: 39.6%.

Workup

  1. customwas placed in a drop funnel, under nitrogen with ice cooling
  2. additionUpon completion of addition
  3. filtrationfiltered
  4. concentrationThe filtrate was concentrated in vacuo
  5. customthe residual was purified by column chromatography (petroleum ether: ethyl acetate=25:1)

Sources & evidence

ORD record
ord-649bd8383cc5423bb738bd3b6639a86f
Source dataset
uspto-grants-2013_01
Patent number
US08344137B2

Reaction notes

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