Water → (3RS,4RS)-4-[3-(4-iodobutyloxy)phenyl]-7-methoxymethyloxy-3-[4-(methoxymethyloxy)phenyl]-3-methyl-2,3-dihydro-4H-benzopyran

HRID 1859321Notes

Reaction equation

HRID 1859321 reaction equation
Cl[CH2:2][CH2:3][CH2:4][CH2:5][O:6][C:7]1[CH:8]=[C:9]([CH:13]2[C:18]3[CH:19]=[CH:20][C:21]([O:23][CH2:24][O:25][CH3:26])=[CH:22][C:17]=3[O:16][CH2:15][C:14]2([C:28]2[CH:33]=[CH:32][C:31]([O:34][CH2:35][O:36][CH3:37])=[CH:30][CH:29]=2)[CH3:27])[CH:10]=[CH:11][CH:12]=1.[I-:38].[Na+].O>C(C(C)=O)C>[I:38][CH2:2][CH2:3][CH2:4][CH2:5][O:6][C:7]1[CH:8]=[C:9]([CH:13]2[C:18]3[CH:19]=[CH:20][C:21]([O:23][CH2:24][O:25][CH3:26])=[CH:22][C:17]=3[O:16][CH2:15][C:14]2([C:28]2[CH:33]=[CH:32][C:31]([O:34][CH2:35][O:36][CH3:37])=[CH:30][CH:29]=2)[CH3:27])[CH:10]=[CH:11][CH:12]=1

Participants

5

Reactant 3

HCID 962WaterHCID 5238Sodium IodideHCID 22123573(3RS,4RS)-4-[3-(4-chlorobutyloxy)phenyl]-7-methoxymethyloxy-3-[4-(methoxymethyloxy)phenyl]-3-methyl-2,3-dihydro-4H-benzopyran

Product 1

HCID 22123635(3RS,4RS)-4-[3-(4-iodobutyloxy)phenyl]-7-methoxymethyloxy-3-[4-(methoxymethyloxy)phenyl]-3-methyl-2,3-dihydro-4H-benzopyranYield 97%

Reagents, catalysts & solvents 1

HCID 6569Methyl Ethyl KetoneSolvent

Procedure

(3RS,4RS)-4-[3-(4-Chlorobutyloxy)phenyl]-7-methoxymethyloxy-3-[4-(methoxymethyloxy)phenyl]-3-methyl-2,3-dihydro-4H-benzopyran (300 mg, 0.57 mmol) and sodium iodide (260 mg, 1.73 mmol) were dissolved in methyl ethyl ketone (30 ml) and then refluxed for 12 hours. The reaction mixture was cooled to room temperature and then water was added thereto. The reaction solution was extracted with ethyl acetate and the organic layer was dried over anhydrous magnesium sulfate, filtered and then concentrated under reduced pressure to remove the organic solvent. The concentrate was separated by column chromatography (n-hexane:ethyl acetate=4:1) to obtain 340 mg (yield: 97%) of the title compound as a colorless oil.

Workup

  1. temperaturerefluxed for 12 hours
  2. extractionThe reaction solution was extracted with ethyl acetate
  3. dry with materialthe organic layer was dried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customto remove the organic solvent
  7. customThe concentrate was separated by column chromatography (n-hexane:ethyl acetate=4:1)

Sources & evidence

ORD record
ord-cab0e74e91794a688628aed68bc60ff9
Source dataset
uspto-grants-2000_11
Patent number
US06153768

Reaction notes

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