1-Ethynyl-2-(trifluoromethyl)benzene → 1-[5-Nitro-6-(2-trifluoromethyl-phenylethynyl)-pyrimidin-4-yl]-piperidine-4-carboxylic acid ethyl ester

HRID 1426080Notes

Reaction equation

HRID 1426080 reaction equation
[CH2:1]([O:3][C:4]([CH:6]1[CH2:11][CH2:10][N:9]([C:12]2[C:17]([N+:18]([O-:20])=[O:19])=[C:16](Cl)[N:15]=[CH:14][N:13]=2)[CH2:8][CH2:7]1)=[O:5])[CH3:2].[C:22]([C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=1[C:30]([F:33])([F:32])[F:31])#[CH:23]>C(N(C(C)C)CC)(C)C.C(Cl)(Cl)Cl.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.[Cu]I>[CH2:1]([O:3][C:4]([CH:6]1[CH2:11][CH2:10][N:9]([C:12]2[C:17]([N+:18]([O-:20])=[O:19])=[C:16]([C:23]#[C:22][C:24]3[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=3[C:30]([F:31])([F:32])[F:33])[N:15]=[CH:14][N:13]=2)[CH2:8][CH2:7]1)=[O:5])[CH3:2]

Participants

7

Reactant 2

HCID 41008561-Ethynyl-2-(trifluoromethyl)benzeneHCID 23477292Ethyl 1-(6-chloro-5-nitropyrimidin-4-yl)piperidine-4-carboxylate

Product 1

HCID 582164521-[5-Nitro-6-(2-trifluoromethyl-phenylethynyl)-pyrimidin-4-yl]-piperidine-4-carboxylic acid ethyl esterYield 35%

Reagents, catalysts & solvents 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 6212ChloroformSolventHCID 81531DiisopropylethylamineSolvent

Conditions

Temperature
70 °C

Procedure

1-{6-chloro-5-nitro-pyrimidin-4-yl}-piperidine-4-carboxylic acid ethyl ester (100 mg, 0.317 mmol), Pd(PPh3)2Cl2 (12 mg, 0.017 mmol) and copper(I)iodide (5 mg, 0.026 mmol) were dissolved in diisopropylethylamine and stirred for 2 min. o-ethynyl-trifluoromethylbenzene (100 ul, 0.072 mmol) was added and the mixture stirred under N2 at 70° C. for 18 hours. The yellow suspension turned black. After cooling to room temperature, the reaction mixture was diluted with chloroform (12 ml), passed through a celite plug and concentrated under vacuo. Purification by Flash Chromatography (0-30% Ethyl acetate/Hexanes) gave Compound Dl. Yield 35%. 1H NMR 400 MHz CDCl3 δ (ppm): 8.58 (s, 1H); 7.78 (d, 1H); 7.71 (d, 1H); 7.56 (m, 2H); 4.16 (m, 2H); 4.01 (d, 2H); 3.21 (m, 2H); 2.63 (m, 1H); 2.03 (m, 2H); 1.84 (m, 2H); 1.26 (t, 3H). LCMS (ESI) m/z 449 (M+H+, 100%)

Workup

  1. additionwas added
  2. temperatureAfter cooling to room temperature
  3. concentrationconcentrated under vacuo
  4. customPurification by Flash Chromatography (0-30% Ethyl acetate/Hexanes)
  5. customgave Compound Dl

Sources & evidence

ORD record
ord-a05af0cd7c6e487eb3aa4a1d68f62080
Source dataset
uspto-grants-2015_01
Patent number
US08933083B2

Reaction notes

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