Triethylamine → Methyl 3-nitro-5-[(trimethylsilyl)ethynyl]benzoate

HRID 541737

Reaction equation

HRID 541737 reaction equation
Br[C:2]1[CH:3]=[C:4]([CH:9]=[C:10]([N+:12]([O-:14])=[O:13])[CH:11]=1)[C:5]([O:7][CH3:8])=[O:6].[CH3:15][Si:16]([C:19]#[CH:20])([CH3:18])[CH3:17].C(N(CC)CC)C>CN(C=O)C.C(OCC)(=O)C.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>[N+:12]([C:10]1[CH:9]=[C:4]([CH:3]=[C:2]([C:20]#[C:19][Si:16]([CH3:18])([CH3:17])[CH3:15])[CH:11]=1)[C:5]([O:7][CH3:8])=[O:6])([O-:14])=[O:13]

Participants

9

Reactant 3

HCID 8471TriethylamineHCID 66111TrimethylsilylacetyleneHCID 239341Methyl 3-bromo-5-nitrobenzoate

Product 1

HCID 57961569Methyl 3-nitro-5-[(trimethylsilyl)ethynyl]benzoateYield 88%

Reagents, catalysts & solvents 5

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 313Hydrochloric AcidSolventHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of methyl 3-bromo-5-nitrobenzoate (0.331 g, 1.27 mmol), (trimethylsilyl)acetylene (0.27 mL, 1.9 mmol), bis(triphenylphosphine)palladium(II) chloride (45 mg, 0.064 mmol), copper(I) iodide (19 mg, 0.10 mmol) and triethylamine (0.26 mL, 1.9 mol) in DMF (5 mL) was stirred at room temperature overnight. The solution was diluted with ethyl acetate and 1 N HCl. The aqueous layer was extracted with ethyl acetate once, and the combined organic solutions were washed with brine, dried over MgSO4, filtered and concentrated. The residue was purified by silica gel chromatography (10% ethyl acetate in hexanes) to give the desired product (310 mg, 88%). LCMS for C13H16NO4Si (M+H)+: m/z=278.1.

Workup

  1. extractionThe aqueous layer was extracted with ethyl acetate once
  2. washthe combined organic solutions were washed with brine
  3. dry with materialdried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe residue was purified by silica gel chromatography (10% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-67d343bf7e1b4022b90e0219bb2f0e9a
Source dataset
uspto-grants-2014_10
Patent number
US08871753B2

Linked notes

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