Cesium carbonate → HCID 66993602, compound

HRID 1879736Notes

Reaction equation

HRID 1879736 reaction equation
[CH2:1]([N:8]1[CH2:14][C:13]2[N:15]=[CH:16][C:17](Cl)=[N:18][C:12]=2[O:11][CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:20][C:21]1[NH:22][CH:23]=[CH:24][N:25]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C=O)C.[Cu](I)I>[CH2:1]([N:8]1[CH2:14][C:13]2[N:15]=[CH:16][C:17]([N:22]3[CH:23]=[CH:24][N:25]=[C:21]3[CH3:20])=[N:18][C:12]=2[O:11][CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 127492-MethylimidazoleHCID 866489818-Benzyl-3-chloro-6,7,8,9-tetrahydropyrazino[2,3-f][1,4]oxazepine

Product 1

HCID 66993602HCID 66993602, compoundYield 15.4%

Reagents, catalysts & solvents 2

HCID 83717Copper iodideCatalystHCID 6228DimethylformamideSolvent

Procedure

A solution of 8-benzyl-3-chloro-6,7,8,9-tetrahydropyrazino[2,3-f][1,4]oxazepine (100 mg), 2-methyl-1H-imidazole (42 mg), copper iodide (14 mg) and cesium carbonate (236 mg) in DMF (2 mL) was stirred at 100° C. overnight. The reaction mixture was filtered, water (10 mL) was added to the filtrate, and the mixture was extracted with ethyl acetate. The aqueous layer was extracted again with ethyl acetate. The combined organic layer was washed with water and saturated brine, dried over magnesium sulfate, and concentrated. The residue was purified by silica gel column chromatography (solvent gradient: 50→100% ethyl acetate/hexane) to give the title compound (18 mg, 15%) as a pale-yellow oil.

Workup

  1. filtrationThe reaction mixture was filtered
  2. additionwater (10 mL) was added to the filtrate
  3. extractionthe mixture was extracted with ethyl acetate
  4. extractionThe aqueous layer was extracted again with ethyl acetate
  5. washThe combined organic layer was washed with water and saturated brine
  6. dry with materialdried over magnesium sulfate
  7. concentrationconcentrated
  8. customThe residue was purified by silica gel column chromatography (solvent gradient: 50→100% ethyl acetate/hexane)

Sources & evidence

ORD record
ord-d1e03e8cb2224b3da390a6b0ab8e2068
Source dataset
uspto-grants-2012_11
Patent number
US08318722B2

Reaction notes

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