Water → (4-Bromo-5-methyl-2-trimethylsilanylethynyl-phenyl)-carbamic acid methyl ester

HRID 1754961Notes

Reaction equation

HRID 1754961 reaction equation
[CH3:1][O:2][C:3](=[O:14])[NH:4][C:5]1[CH:10]=[C:9]([CH3:11])[C:8]([Br:12])=[CH:7][C:6]=1I.[CH3:15][Si:16]([C:19]#[CH:20])([CH3:18])[CH3:17].C(N(CC)CC)C.O>C1COCC1.[Cu](I)I.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>[CH3:1][O:2][C:3](=[O:14])[NH:4][C:5]1[CH:10]=[C:9]([CH3:11])[C:8]([Br:12])=[CH:7][C:6]=1[C:20]#[C:19][Si:16]([CH3:18])([CH3:17])[CH3:15]

Participants

8

Reactant 4

HCID 962WaterHCID 8471TriethylamineHCID 66111TrimethylsilylacetyleneHCID 57543475Methyl (4-Bromo-2-iodo-5-methylphenyl)carbamate

Product 1

HCID 66816224(4-Bromo-5-methyl-2-trimethylsilanylethynyl-phenyl)-carbamic acid methyl esterYield 98.2%

Reagents, catalysts & solvents 3

HCID 83717Copper iodideCatalystHCID 178418476HCID 178418476, compoundCatalystHCID 8028TetrahydrofuranSolvent

Procedure

(4-Bromo-2-iodo-5-methyl-phenyl)-carbamic acid methyl ester (605 mg, 1.64 mmol) was dissolved in THF (6 ml). (Trimethylsilyl)acetylene (0.70 ml, 4.95 mmol), copper iodide (33.5 mg, 0.175 mmol), Pd(PPh3)2Cl2 (56.5 mg, 0.081 mmol) and triethylamine (0.690 ml, 4.95 mmol) were added and the mixture was stirred at room temperature for four hours. Water was added to the reaction system, followed by extraction with ethyl acetate. The organic layer was washed with water and saturated brine, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (n-hexane-ethyl acetate) to give (4-bromo-5-methyl-2-trimethylsilanylethynyl-phenyl)-carbamic acid methyl ester (548 mg, 98%).

Workup

  1. extractionfollowed by extraction with ethyl acetate
  2. washThe organic layer was washed with water and saturated brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe resulting residue was purified by silica gel column chromatography (n-hexane-ethyl acetate)

Sources & evidence

ORD record
ord-771d5be57ea242c48f04c7a35d2f0c28
Source dataset
uspto-grants-2015_10
Patent number
US09169254B2

Reaction notes

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