Acetone → 1-Ethyl-7-(3-iodopropoxy)-3,3,5-trimethyl-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dione

HRID 2196057Notes

Reaction equation

HRID 2196057 reaction equation
Cl[CH2:2][CH2:3][CH2:4][O:5][C:6]1[CH:23]=[CH:22][C:9]2[N:10]([CH2:20][CH3:21])[C:11](=[O:19])[C:12]([CH3:18])([CH3:17])[C:13](=[O:16])[N:14]([CH3:15])[C:8]=2[CH:7]=1.[I-:24].[Na+].CC(C)=O>O>[CH2:20]([N:10]1[C:11](=[O:19])[C:12]([CH3:18])([CH3:17])[C:13](=[O:16])[N:14]([CH3:15])[C:8]2[CH:7]=[C:6]([O:5][CH2:4][CH2:3][CH2:2][I:24])[CH:23]=[CH:22][C:9]1=2)[CH3:21]

Participants

5

Reactant 3

HCID 180AcetoneHCID 5238Sodium IodideHCID 686732537-(3-Chloropropoxy)-1-ethyl-3,3,5-trimethyl-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dione

Product 1

HCID 686727921-Ethyl-7-(3-iodopropoxy)-3,3,5-trimethyl-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dioneYield 100.2%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

7-(3-Chloropropoxy)-1-ethyl-3,3,5-trimethyl-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dione (2.18 g, 6.4 mmol) and sodium iodide (4.8 g, 32 mmol) were added to acetone (50 ml), and heated under reflux for 8.5 hours. The reaction mixture was cooled to room temperature, water was added, and extraction with ethyl acetate was performed. The organic layer was dried over sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=1:1). The purified product was concentrated under reduced pressure to thereby obtain 2.76 g (yield: 100%) of 1-ethyl-7-(3-iodopropoxy)-3,3,5-trimethyl-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dione as a colorless oil.

Workup

  1. temperatureheated
  2. temperatureunder reflux for 8.5 hours
  3. extractionextraction with ethyl acetate
  4. dry with materialThe organic layer was dried over sodium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=1:1)
  7. concentrationThe purified product was concentrated under reduced pressure

Sources & evidence

ORD record
ord-f1510c92539c47e6b6a6871b0ae81e7c
Source dataset
uspto-grants-2012_12
Patent number
US08338406B2

Reaction notes

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