Iodine → HCID 11175139, compound

HRID 494862Notes

Reaction equation

HRID 494862 reaction equation
[OH:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([C:14](=[O:16])[CH3:15])[CH:9]=2)=[CH:4][CH:3]=1.[I-:17].[K+].II>N.O>[OH:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([C:14](=[O:16])[CH3:15])[CH:9]=2)=[CH:6][C:7]=1[I:17]

Participants

6

Reactant 3

HCID 807Iodine2×HCID 4875Potassium Iodide2×HCID 112181061-(4'-Hydroxy-1,1'-biphenyl-3-yl)ethanone

Product 1

HCID 11175139HCID 11175139, compoundYield 21%

Reagents, catalysts & solvents 2

HCID 222AmmoniaSolventHCID 962WaterSolvent2×

Procedure

The product from Example 136A (5.76 g, 27 mmol) was suspended in concentrated aqueous ammonia (400 mL) and treated with a solution of potassium iodide (23.3 g, 140 mmol) and iodine (7.24 g, 28.5 mmol) in water (100 mL). As the reaction did not go to completion, the mixture was treated with a second solution of potassium iodide (15.8 g, 95 mmol) and iodine (4.83 g, 19 mmol) in water (50 mL). After an hour the ammonia was removed under reduced pressure on a rotary evaporator. The mixture was extracted with EtOAc, and the combined organic phases were washed consecutively with pH 6 potassium phosphate buffer and brine, then dried (Na2SO4), concentrated, and chromatographed through silica with 1% acetic acid in a gradient of 0 to 5% EtOAc/CH2Cl2 to provide the title compound as a beige powder (21% yield). MS (ESI APCI negative ion detection) m/z 337 (M−H)−; 1HNMR (300 MHz, CDCl3) δ 2.65 (s, 3H), 5.37 (bs, 1H), 7.08 (d, 1H), 7.48-7.55 (m, 2H), 7.71 (ddd, 1H), 7.88-7.93 (m, 2H), 8.09 (dd, 1H).

Workup

  1. customAfter an hour the ammonia was removed under reduced pressure on a rotary evaporator
  2. extractionThe mixture was extracted with EtOAc
  3. washthe combined organic phases were washed consecutively with pH 6 potassium phosphate buffer and brine
  4. dry with materialdried (Na2SO4)
  5. concentrationconcentrated
  6. customchromatographed through silica with 1% acetic acid in a gradient of 0 to 5% EtOAc/CH2Cl2

Sources & evidence

ORD record
ord-bf189426b4794daea47c72bb54ffff3f
Source dataset
uspto-grants-2009_05
Patent number
US07538138B2

Reaction notes

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