Triethylamine → HCID 86608007, compound

HRID 558578Notes

Reaction equation

HRID 558578 reaction equation
I[C:2]1[N:3]=[CH:4][N:5]2[C:10]([C:11]([F:14])([F:13])[F:12])=[CH:9][C:8]([C:15]3[CH:20]=[CH:19][C:18]([C:21]([F:24])([F:23])[F:22])=[CH:17][CH:16]=3)=[N:7][C:6]=12.[CH3:25][Si:26]([C:29]#[CH:30])([CH3:28])[CH3:27].C(N(CC)CC)C.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>CN(C)C=O.O.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>[F:12][C:11]([F:14])([F:13])[C:10]1[N:5]2[CH:4]=[N:3][C:2]([C:30]#[C:29][Si:26]([CH3:28])([CH3:27])[CH3:25])=[C:6]2[N:7]=[C:8]([C:15]2[CH:20]=[CH:19][C:18]([C:21]([F:24])([F:23])[F:22])=[CH:17][CH:16]=2)[CH:9]=1

Participants

9

Reactant 4

HCID 8471TriethylamineHCID 11776TriphenylphosphineHCID 66111TrimethylsilylacetyleneHCID 86608005HCID 86608005, compound

Product 1

HCID 86608007HCID 86608007, compoundYield 53.1%

Reagents, catalysts & solvents 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A mixture of 8-iodo-4-trifluoromethyl-2-(4-trifluoromethyl-phenyl)-imidazo[1,5-a]pyrimidine (1.65 g, 3.61 mmol), trimethylsilylacetylene (0.9 mL, 6.5 mmol) and triethylamine (1.51 mL, 10.8 mmol) in N,N-dimethylformamide (10 mL) was stirred for 10 min at room temperature while being purged with Argon, then PdCl2(PPh3)2 (0.76 mg, 0.11 mmol), PPh3 (57 mg, 0.22 mmol) and CuI (7 mg, 0.04 mmol) were added. Stirring was continued at 90° C. for 3.5 h. The reaction mixture was cooled to room temperature, diluted with water (50 mL) and extracted with ethyl acetate (2×100 mL). The combined organic layers were washed with water (50 mL) and brine (50 mL), dried (MgSO4), evaporated and further purified by flash chromatography on silica gel (ethyl acetate/heptane) to give 4-trifluoromethyl-2-(4-trifluoromethyl-phenyl)-8-trimethylsilanylethynyl-imidazo[1,5-a]pyrimidine (0.82 g, 53%) as a brown solid, which was dissolved in THF (10 mL) and MeOH (10 mL), while stirring at 0° C. potassium carbonate (26 mg, 0.19 mmol) was added and the mixture was stirred at 0° C. for 5 h. The mixture was diluted with ice water (50 mL) and extracted with TBME (2×100 mL). The combined organic layers were washed with brine (50 mL), dried (MgSO4) and evaporated. The crude product was further purified by flash chromatography on silica gel (heptane/EtOAc) followed by crystallization from diethyl ether/hexane to give 8-ethynyl-4-trifluoromethyl-2-(4-trifluoromethyl-phenyl)-imidazo[1,5-a]pyrimidine (0.54 g, 42%) as a brown solid. MS (EI) 355.1 [(M)+]; mp 163° C.

Workup

  1. customwhile being purged with Argon
  2. stirringStirring
  3. waitwas continued at 90° C. for 3.5 h
  4. temperatureThe reaction mixture was cooled to room temperature
  5. extractionextracted with ethyl acetate (2×100 mL)
  6. washThe combined organic layers were washed with water (50 mL) and brine (50 mL)
  7. dry with materialdried (MgSO4)
  8. customevaporated
  9. customfurther purified by flash chromatography on silica gel (ethyl acetate/heptane)

Sources & evidence

ORD record
ord-7ba4fd713bba4e7791b6109377c32861
Source dataset
uspto-grants-2011_11
Patent number
US08063048B2

Reaction notes

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