Ethyl Acetate → HCID 66646404, compound

HRID 1187096Notes

Reaction equation

HRID 1187096 reaction equation
Br[C:2]1[CH:11]=[CH:10][C:5]2[C:6](=[O:9])[O:7][CH2:8][C:4]=2[C:3]=1[CH2:12][CH2:13][OH:14].[CH2:15]([Sn](CCCC)(CCCC)C=C)[CH2:16]CC.[Li+].[Cl-].CCOC(C)=O>C1(C)C=CC=CC=1.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH:15]([C:2]1[CH:11]=[CH:10][C:5]2[C:6](=[O:9])[O:7][CH2:8][C:4]=2[C:3]=1[CH2:12][CH2:13][OH:14])=[CH2:16]

Participants

7

Reactant 4

HCID 8857Ethyl AcetateHCID 81998TributylvinyltinHCID 433294Lithium ChlorideHCID 66644089HCID 66644089, compound

Product 1

HCID 66646404HCID 66646404, compound

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 1140TolueneSolvent

Conditions

Temperature
105 °C

Procedure

A mixture of 5-bromo-4-(2-hydroxyethyl)-2-benzofuran-1(3H)-one (0.460 g, 1.78 mmol), tributyl(vinyl)tin (0.676 g, 2.13 mmol), LiCl (0.224 g, 5.33 mmol) and Pd (PPh3)4 (0.10 g, 0.087 mmol) in toluene (50 mL) was heated at 100-110° C. under N2 overnight; TLC indicated that reaction had gone to completion and to the solution was poured EtOAc (100 mL) and washed with brine, water, dried over Na2SO4, filtered and concentrated to dryness. The residue was then absorbed into silica gel and separated over silica column to give 5-ethenyl-4-(2-hydroxyethyl)-2-benzofuran-1(3H)-one. 1H-NMR (400 MHz, CDCl3) δ ppm 7.74 (d, J=7.8 Hz, 1H), 7.67 (d, J=7.8 Hz, 1H), 7.00-7.07 (m, 1H), 5.79-5.84 (m, 1H), 5.50-5.53 (m, 1H), 5.35 (s, 2H), 3.86 (t, J=6.3 Hz, 2H), 2.93 (t, J=6.3 Hz, 2H).

Workup

  1. customTLC indicated that reaction
  2. washwashed with brine, water
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated to dryness
  6. customThe residue was then absorbed into silica gel
  7. customseparated over silica column

Sources & evidence

ORD record
ord-0cfe1b21aafe41fea97b41417aaa9385
Source dataset
uspto-grants-2014_03
Patent number
US08673920B2

Reaction notes

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