Sodium Nitrite → 5-(3-(3,5-Dichloro-4-fluorophenyl)-4,4,4-trifluorobut-1-enyl)-1-nitrosoindoline

HRID 1502979Notes

Reaction equation

HRID 1502979 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([CH:10]([C:22]([F:25])([F:24])[F:23])/[CH:11]=[CH:12]/[C:13]2[CH:14]=[C:15]3[C:19](=[CH:20][CH:21]=2)[NH:18][CH2:17][CH2:16]3)[CH:5]=[C:6]([Cl:9])[C:7]=1[F:8].[N:26]([O-])=[O:27].[Na+]>Cl.O.C(Cl)Cl>[Cl:1][C:2]1[CH:3]=[C:4]([CH:10]([C:22]([F:24])([F:23])[F:25])[CH:11]=[CH:12][C:13]2[CH:14]=[C:15]3[C:19](=[CH:20][CH:21]=2)[N:18]([N:26]=[O:27])[CH2:17][CH2:16]3)[CH:5]=[C:6]([Cl:9])[C:7]=1[F:8]

Participants

6

Reactant 2

HCID 23668193Sodium NitriteHCID 86675163(E)-5-(3-(3,5-Dichloro-4-fluorophenyl)-4,4,4-trifluorobut-1-enyl)indoline

Product 1

HCID 866751645-(3-(3,5-Dichloro-4-fluorophenyl)-4,4,4-trifluorobut-1-enyl)-1-nitrosoindoline

Reagents, catalysts & solvents 3

HCID 313Hydrochloric AcidSolventHCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

To (E)-5-(3-(3,5-dichloro-4-fluorophenyl)-4,4,4-trifluorobut-1-enyl)indoline (0.2 g, 0.5 mmol) in concentrated HCl (5.0 ml) at 5° C., was added slowly NaNO2 in water and the reaction was allowed to stir at ambient temperature for 2 h. The reaction mixture was diluted with CH2Cl2, and the CH2Cl2 layer washed with water and brine solution. The separated CH2Cl2 layer was dried over anhydrous Na2SO4 and concentrated under reduced pressure to afford the crude product as a pale yellow solid that was used in the next step without further purification (0.2 g): 1H NMR (400 MHz, CDCl3) δ 7.33 (d, J=8.4 Hz, 1H), 7.39 (m, 4H), 6.61 (d, J=16.0 Hz, 1H), 6.35 (dd, J=16.0, 8.4 Hz, 1H), 4.07 (m, 3H), 3.23 (t, J=8.4 Hz, 2H); ESIMS m/z 418.82 ([M+H]+); IR (thin film) 1488, 1112, 860 cm−1.

Workup

  1. washthe CH2Cl2 layer washed with water and brine solution
  2. dry with materialThe separated CH2Cl2 layer was dried over anhydrous Na2SO4
  3. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-19c101112381452eb494f148647709c5
Source dataset
uspto-grants-2015_12
Patent number
US09211281B2

Reaction notes

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