Sodium triacetoxyborohydride → 1-benzyl-N-(4-{[tert-butyl(dimethyl)silyl]oxy}cyclohexyl)-1H-1,2,3-triazol-5-amine

HRID 519772Notes

Reaction equation

HRID 519772 reaction equation
[CH2:1]([N:8]1[C:12]([NH2:13])=[CH:11][N:10]=[N:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Si:14]([O:21][CH:22]1[CH2:27][CH2:26][C:25](=O)[CH2:24][CH2:23]1)([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:16])[CH3:15].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C(O)(=O)C>[CH2:1]([N:8]1[C:12]([NH:13][CH:25]2[CH2:26][CH2:27][CH:22]([O:21][Si:14]([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:15])[CH3:16])[CH2:23][CH2:24]2)=[CH:11][N:10]=[N:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 5049666Sodium triacetoxyborohydrideHCID 106094304-(tert-Butyldimethylsilyloxy)cyclohexanoneHCID 233617711-benzyl-1H-1,2,3-triazol-5-amine

Product 1

HCID 670091201-benzyl-N-(4-{[tert-butyl(dimethyl)silyl]oxy}cyclohexyl)-1H-1,2,3-triazol-5-amineYield 47.2%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

To a solution of 1-benzyl-1H-1,2,3-triazol-5-amine (10.61 g) and 4-{[tert-butyl(dimethyl)silyl]oxy}cyclohexanone (15.07 g) in acetic acid (80 mL) was added sodium triacetoxyborohydride (19.37 g), and the mixture was stirred at room temperature for 18 hr. The solvent was evaporated under reduced pressure, the residue was diluted with saturated aqueous sodium hydrogen carbonate solution, and the mixture was extracted with ethyl acetate-isopropyl alcohol (3:1). The extract was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel chromatography [eluent: hexane/ethyl acetate=80/20→60/40 (volume ratio)] to give the title compound as a pale-yellow oil (11.12 g, 47%).

Workup

  1. customThe solvent was evaporated under reduced pressure
  2. additionthe residue was diluted with saturated aqueous sodium hydrogen carbonate solution
  3. extractionthe mixture was extracted with ethyl acetate-isopropyl alcohol (3:1)
  4. washThe extract was washed with saturated brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. customThe solvent was evaporated under reduced pressure
  7. customthe residue was purified by silica gel chromatography [eluent: hexane/ethyl acetate=80/20→60/40 (volume ratio)]

Sources & evidence

ORD record
ord-04f2415fd86f494b8dd57eaf38136f10
Source dataset
uspto-grants-2015_08
Patent number
US09115136B2

Reaction notes

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