Hydrochloric Acid → HCID 86620750, compound

HRID 554315Notes

Reaction equation

HRID 554315 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([S:8]([N:11]2[C:15]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)=[C:14]([CH3:22])[C:13]([C:23](OC)=[O:24])=[CH:12]2)(=[O:10])=[O:9])=[CH:4][CH:3]=1.[H-].C([Al+]CC(C)C)C(C)C.Cl>O1CCCC1.C1(C)C=CC=CC=1>[F:1][C:2]1[CH:3]=[CH:4][C:5]([S:8]([N:11]2[C:15]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)=[C:14]([CH3:22])[C:13]([CH:23]=[O:24])=[CH:12]2)(=[O:9])=[O:10])=[CH:6][CH:7]=1

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 21225700DiisobutylaluminumhydrideHCID 66924852HCID 66924852, compound

Product 1

HCID 86620750HCID 86620750, compoundYield 53%

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
-78 °C

Procedure

Under a nitrogen atmosphere, a solution (40 mL) of methyl 1-[(4-fluorophenyl)sulfonyl]-4-methyl-5-phenyl-1H-pyrrole-3-carboxylate (1.48 g) in tetrahydrofuran was cooled to −78° C., and a 1.5 mol/L solution (7.9 mL) of diisobutylaluminum hydride in toluene was added dropwise over 15 min, and the mixture was further stirred at −78° C. for 30 min. 1 mol/L Hydrochloric acid (40 mL) was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with water and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was dissolved in acetonitrile solution (60 mL), added tetra-n-propylammonium perruthenate (0.14 g), N-methylmorpholine N-oxide hydrate (0.80 g) and molecular sieves 4A powder (4.0 g), and the mixture was stirred at room temperature for 2 hr. The reaction mixture was concentrated under reduced pressure, ethyl acetate (200 mL) was added to the residue, the suspension was filtered through celite, and celite was washed with ethyl acetate. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=19:1→3:1) to give the title compound as a colorless oil (yield 721 mg, 53%).

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe extract was washed with water and saturated brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated under reduced pressure
  5. dissolutionThe residue was dissolved in acetonitrile solution (60 mL)
  6. additionadded tetra-n-propylammonium perruthenate (0.14 g), N-methylmorpholine N-oxide hydrate (0.80 g) and molecular sieves 4A powder (4.0 g)
  7. stirringthe mixture was stirred at room temperature for 2 hr
  8. concentrationThe reaction mixture was concentrated under reduced pressure, ethyl acetate (200 mL)
  9. additionwas added to the residue
  10. filtrationthe suspension was filtered through celite, and celite
  11. washwas washed with ethyl acetate
  12. concentrationThe filtrate was concentrated under reduced pressure
  13. customthe residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=19:1→3:1)

Sources & evidence

ORD record
ord-fc28209efbea42aeaf9b68ad4f8bb419
Source dataset
uspto-grants-2011_11
Patent number
US08048909B2

Reaction notes

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