Dichloromethane → 8,8-dichloro-1-phenyl-1,2,9,10-tetrahydro[1,4]oxazino[2,3,4-jk]carbazol-7(8H)-one

HRID 585439Notes

Reaction equation

HRID 585439 reaction equation
[C:1]1([CH:7]2[N:21]3[C:22]4[C:14]([C:15]5[C:16](=[O:23])C[CH2:18][CH2:19][C:20]=53)=[CH:13][CH:12]=[CH:11][C:10]=4[O:9][CH2:8]2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.FC(F)(F)C(O)=O.[CH2:31]([Cl:33])[Cl:32]>C(OCC)(=O)C.C(#N)C>[Cl:32][C:31]1([Cl:33])[C:16](=[O:23])[C:15]2[C:14]3[C:22]4=[C:10]([O:9][CH2:8][CH:7]([C:1]5[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=5)[N:21]4[C:20]=2[CH2:19][CH2:18]1)[CH:11]=[CH:12][CH:13]=3

Participants

6

Reactant 3

HCID 6344DichloromethaneHCID 6422Trifluoroacetic acidHCID 121486191-phenyl-1,2,9,10-tetrahydro[1,4]oxazino[2,3,4-jk]carbazol-7(8H)-one

Product 1

HCID 121486298,8-dichloro-1-phenyl-1,2,9,10-tetrahydro[1,4]oxazino[2,3,4-jk]carbazol-7(8H)-oneYield 61%

Reagents, catalysts & solvents 2

HCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
95 °C

Procedure

To a mixture of 1-phenyl-1,2,9,10-tetrahydro[1,4]oxazino[2,3,4-jk]carbazol-7(8H)-one (0.5681 g, 1.87 mmol) in ethyl acetate (10 mL) and acetonitrile (10 mL) is added trifluoroacetic acid (2 mL). Anhydrous cupric chloride (1.26 g, 9.36 mmol) is added and the mixture is heated to reflux at 95° C. for 2 h. After 5 h, additional anhydrous cupric chloride (0.63 g, 4.68 mmol) is added and the mixture is refluxed an additional hour. The mixture is then poured into CH2Cl2 (150 mL) and filtered. The filtrates are washed with aqueous potassium carbonate. The layers are separated and the organic layer is washed twice with water (200 mL), dried over magnesium sulfate and concentrated. Column chromatography (70 g silica gel) using ethyl acetate/CH2Cl2/hexane (5:45:50) gave 0.428 g (61%) of 8,8-dichloro-1-phenyl-1,2,9,10-tetrahydro[1,4]oxazino[2,3,4-jk]carbazol-7(8H)-one.

Workup

  1. temperaturethe mixture is heated
  2. temperaturethe mixture is refluxed an additional hour
  3. filtrationfiltered
  4. washThe filtrates are washed with aqueous potassium carbonate
  5. customThe layers are separated
  6. washthe organic layer is washed twice with water (200 mL)
  7. dry with materialdried over magnesium sulfate
  8. concentrationconcentrated

Sources & evidence

ORD record
ord-3a5d70eed3754967a35d63dff37d3d6d
Source dataset
uspto-grants-2005_08
Patent number
US06932961B1

Reaction notes

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