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

HRID 1502699
Notes
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Reaction equation

HRID 1502699 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]
ParticipantsProcedureWorkupSources & evidenceReaction notes

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 962WaterSolvent
HCID 6344
Dichloromethane
Solvent

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-c505d7df954c490ebb725b70b476105a
Source dataset
uspto-grants-2015_12
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09210927B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes