Sodium borohydride → HCID 59394974, compound

HRID 383343Notes

Reaction equation

HRID 383343 reaction equation
[C:1](=[O:20])([O:18][CH3:19])[O:2][C:3]1[CH:8]=[C:7]([N+:9]([O-])=O)[C:6]([Br:12])=[CH:5][C:4]=1[CH:13]1[CH2:17][CH2:16][CH2:15][CH2:14]1.[BH4-].[Na+].C(OCC)(=O)C.CCCCCC>CO.Cl[Ni]Cl>[C:1](=[O:20])([O:18][CH3:19])[O:2][C:3]1[CH:8]=[C:7]([NH2:9])[C:6]([Br:12])=[CH:5][C:4]=1[CH:13]1[CH2:17][CH2:16][CH2:15][CH2:14]1

Participants

6

Reactant 3

HCID 4311764Sodium borohydrideHCID 21226206Ethyl acetate hexaneHCID 593949534-Bromo-2-cyclopentyl-5-nitrophenyl methyl carbonate

Product 1

HCID 59394974HCID 59394974, compoundYield 54%

Reagents, catalysts & solvents 2

HCID 24385Nickel DichlorideCatalystHCID 887MethanolSolvent

Procedure

Alternative Procedure: To a solution of 4-bromo-2-cyclopentyl-5-nitrophenyl methyl carbonate (100 mg, 0.29 mmol) and NiCl2 (49 mg, 0.38 mmol) in methanol (1.0 mL) was added NaBH4 (14 mg, 0.38 mmol) portion-wise at 0° C. The reaction was stirred for 5 min then quenched with NaHCO3 and diluted with ethyl acetate. The reaction mixture was filtered through a pad of Celite and the layers separated. The aqueous layer was re-extracted with ethyl acetate and the combined organic extracts were dried over Na2SO4, filtered and concentrated. Silica gel chromatography (10% ethyl acetate/hexane) provided 5-amino-4-bromo-2-cyclopentylphenyl methyl carbonate (49 mg, 54% yield).

Workup

  1. customthen quenched with NaHCO3
  2. additiondiluted with ethyl acetate
  3. filtrationThe reaction mixture was filtered through a pad of Celite
  4. customthe layers separated
  5. extractionThe aqueous layer was re-extracted with ethyl acetate
  6. dry with materialthe combined organic extracts were dried over Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated

Sources & evidence

ORD record
ord-8ebcd8c355a5494f8d4a4b54952825c8
Source dataset
uspto-grants-2013_02
Patent number
US08367660B2

Reaction notes

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