Dimethylformamide → HCID 21883651, compound

HRID 393334

Reaction equation

HRID 393334 reaction equation
I[C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[NH:8][CH:7]([C:12]([F:15])([F:14])[F:13])[C:6]([C:16]([O:18][CH2:19][CH3:20])=[O:17])=[CH:5]2.[CH3:21][N:22](C)C=O>[C-]#N.[Zn+2].[C-]#N.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.C(OCC)(=O)C>[C:21]([C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[NH:8][CH:7]([C:12]([F:15])([F:14])[F:13])[C:6]([C:16]([O:18][CH2:19][CH3:20])=[O:17])=[CH:5]2)#[N:22]

Participants

6

Reactant 2

HCID 6228DimethylformamideHCID 21883508Ethyl 6-iodo-1,2-dihydro-2-(trifluoromethyl)-3-quinolinecarboxylate

Product 1

HCID 21883651HCID 21883651, compoundYield 48%

Reagents, catalysts & solvents 3

HCID 11186Zinc cyanide (Zn(CN)2)CatalystHCID 178418397HCID 178418397, compoundCatalystHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
80 °C

Procedure

N,N-Dimethylformamide (5 mL) was degassed with nitrogen for thirty minutes in a three neck round bottom flask equipped with a condenser, temperature monitoring, nitrogen purge and heating mantle. Ethyl 6-iodo-1,2-dihydro-2-(trifluoromethyl)-3-quinolinecarboxylate (Example 158) (0.522 g, 1.32 mmol) and zinc cyanide (0.102 g, 0.792 mmol) were added to the N,N-dimethylformamide and stirred vigorously for ten minutes. Tetrakis(triphenylphosphine)palladium(0) (0.068 g, 0.53 mmol) was added and the contents gently warmed to 80° C. for 2 hours under a nitrogen atmosphere. Ethyl acetate (20 mL) was added, followed by extraction with aqueous 2 N ammonium hydroxide (2×10 mL), water (2×10 mL), saturated ammonium chloride (2×10 mL), dried over sodium sulfate and solvent removed in vacuo to yield a yellow solid. The product was purified by flash chromatography (silica gel, ethyl acetate-hexanes, 3:1) to yield, upon concentration of the appropriate fractions, ethyl 6-cyano-1,2-dihydro-2-(trifluoromethyl)-3-quinolinecarboxylate as a yellow solid (188 mg, 48%): mp 211-212° C. 1H NMR (CDCl3/300 MHz) 7.68 (s, 1H), 7.43 (m, 2H), 6.69 (d, 1H, J=8.3 Hz), 5.22 (m, 1H), 4.98 (br s, 1H), 1.30 (m, 2H), 1.36 (t, 3H, J=7.1 Hz). EIHRMS m/z 314.1147 (M+NH4+, Calc'd 314.1116). Anal. Calc'd for C14H11F3N2O2: C, 56.76; H, 3.74; N, 9.46. Found: C, 56.44; H, 4.03; N, 9.29.

Workup

  1. customN,N-Dimethylformamide (5 mL) was degassed with nitrogen for thirty minutes in a three neck round bottom flask
  2. customequipped with a condenser
  3. customtemperature monitoring, nitrogen purge
  4. temperatureheating mantle
  5. extractionfollowed by extraction with aqueous 2 N ammonium hydroxide (2×10 mL), water (2×10 mL), saturated ammonium chloride (2×10 mL)
  6. dry with materialdried over sodium sulfate and solvent
  7. customremoved in vacuo
  8. customto yield a yellow solid
  9. customThe product was purified by flash chromatography (silica gel, ethyl acetate-hexanes, 3:1)

Sources & evidence

ORD record
ord-7d310edf889e4ae0ba25db7818430f30
Source dataset
uspto-grants-2004_10
Patent number
US06806288B1

Linked notes

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