Triethylamine → Methyl 2-(4-fluoro-2-((trimethylsilyl)ethynyl)phenyl)acetate

HRID 1711087Notes

Reaction equation

HRID 1711087 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9]([O:11][CH3:12])=[O:10])=[C:4](I)[CH:3]=1.C(N(CC)CC)C.[CH3:21][Si:22]([C:25]#[CH:26])([CH3:24])[CH3:23]>COCCOC.[Cu]I.[Pd](Cl)Cl.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[F:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9]([O:11][CH3:12])=[O:10])=[C:4]([C:26]#[C:25][Si:22]([CH3:24])([CH3:23])[CH3:21])[CH:3]=1

Participants

7

Reactant 3

HCID 8471TriethylamineHCID 66111TrimethylsilylacetyleneHCID 59457703Methyl 2-(4-fluoro-2-iodophenyl)acetate

Product 1

HCID 59457720Methyl 2-(4-fluoro-2-((trimethylsilyl)ethynyl)phenyl)acetateYield 97%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 6102075Dichlorobis(triphenylphosphine)palladiumCatalystHCID 80711,2-DimethoxyethaneSolvent

Procedure

To a solution of ester 325 (3.80 g, 12.9 mmol) in dry DME (100 mL) at 0° C. was added triethylamine (4.5 mL, 3.3 g, 33 mmol), copper (I) iodide (0.50 g, 2.6 mmol), and bis(triphenylphosphine) palladium (II) chloride (0.38 g, 0.54 mmol). The mixture was degassed with a stream of N2 for 5 min, then trimethylsilylacetylene (4.0 mL, 2.8 g, 29 mmol) was added and the reaction mixture was warmed to room temperature and stirred for 3 h. It was then concentrated under reduced pressure, re-dissolved in ether, filtered and concentrated. Silica gel chromatography of the residue (eluent 10% ethyl acetate/hexanes) afforded 326 (3.30 g, 97% yield). 1H NMR (400 MHz, CDCl3) δ (ppm): 7.23 (dd, J=8.6, 5.7 Hz, 1H); 7.14 (dd, J=9.0, 2.7 Hz, 1H); 7.00 (dt, J=8.4, 2.7 Hz, 1H); 3.79 (s, 2H); 3.70 (s, 3H); 0.25 (s, 9H). LCMS: (M+H) 265.2.

Workup

  1. customThe mixture was degassed with a stream of N2 for 5 min
  2. concentrationIt was then concentrated under reduced pressure
  3. dissolutionre-dissolved in ether
  4. filtrationfiltered
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-12ef752046de4b77a9f80da677fb9b13
Source dataset
uspto-grants-2010_09
Patent number
US07790729B2

Reaction notes

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