Hydrochloric Acid → 2-(Ethylsulfanyl)-5-fluorobenzonitrile

HRID 1015856Notes

Reaction equation

HRID 1015856 reaction equation
Br[C:2]1[CH:9]=[CH:8][C:7]([F:10])=[CH:6][C:3]=1[C:4]#[N:5].[CH2:11]([S-:13])[CH3:12].[Na+].C(N(CC)C(C)C)(C)C.Cl>C1(C)C=CC=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2>[CH2:11]([S:13][C:2]1[CH:9]=[CH:8][C:7]([F:10])=[CH:6][C:3]=1[C:4]#[N:5])[CH3:12]

Participants

8

Reactant 4

HCID 313Hydrochloric AcidHCID 81531DiisopropylethylamineHCID 936542-Bromo-5-fluorobenzonitrileHCID 4459711Sodium ethanethiolate

Product 1

HCID 636676962-(Ethylsulfanyl)-5-fluorobenzonitrileYield 40%

Reagents, catalysts & solvents 3

HCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)CatalystHCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 1140TolueneSolvent

Procedure

(Step 1) A mixture of 2-bromo-5-fluorobenzonitrile (5.0 g), sodium ethanethiolate (2.31 g), Pd2(dba)3 (114 mg), Xantphos (145 mg) and N,N-diisopropylethylamine (6.46 g) was stirred in toluene (100 ml) at 90° C. for 9 hr under a nitrogen atmosphere. The reaction mixture was treated with 1N hydrochloric acid, and extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over magnesium sulfate. The solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:19) to give 2-(ethylsulfanyl)-5-fluorobenzonitrile (1.81 g) as a solid.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe organic layer was washed with saturated brine
  3. dry with materialdried over magnesium sulfate
  4. customThe solvent was evaporated under reduced pressure
  5. customThe residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:19)

Sources & evidence

ORD record
ord-935df9bbcaec4dd0a0447281d1fbb28d
Source dataset
uspto-grants-2011_07
Patent number
US07985863B2

Reaction notes

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