Sodium Bicarbonate → 3-Methyl-5-[1-(4-[(5-nitro-2-furyl)methyl]aminophenyl)-4-piperidyl]-2,3-dihydro-1,3,4-oxadiazol-2-one

HRID 515431Notes

Reaction equation

HRID 515431 reaction equation
[CH3:1][N:2]1[N:6]=[C:5]([CH:7]2[CH2:12][CH2:11][N:10]([C:13]3[CH:18]=[CH:17][C:16](/[N:19]=[CH:20]/[C:21]4[O:22][C:23]([N+:26]([O-:28])=[O:27])=[CH:24][CH:25]=4)=[CH:15][CH:14]=3)[CH2:9][CH2:8]2)[O:4][C:3]1=[O:29].C([BH3-])#N.[Na+].C(=O)(O)[O-].[Na+]>CC(O)=O.CO>[CH3:1][N:2]1[N:6]=[C:5]([CH:7]2[CH2:8][CH2:9][N:10]([C:13]3[CH:14]=[CH:15][C:16]([NH:19][CH2:20][C:21]4[O:22][C:23]([N+:26]([O-:28])=[O:27])=[CH:24][CH:25]=4)=[CH:17][CH:18]=3)[CH2:11][CH2:12]2)[O:4][C:3]1=[O:29]

Participants

6

Reactant 3

HCID 516892Sodium BicarbonateHCID 5003444Sodium cyanoborohydrideHCID 178481743HCID 178481743, compound

Product 1

HCID 716170383-Methyl-5-[1-(4-[(5-nitro-2-furyl)methyl]aminophenyl)-4-piperidyl]-2,3-dihydro-1,3,4-oxadiazol-2-oneYield 86%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidCatalystHCID 887MethanolSolvent

Procedure

3-Methyl-5-[1-(4-[(E)-1-(5-nitro-2-furyl)methylidene]aminophenyl)-4-piperidyl]-2,3-dihydro-1,3,4-oxadiazol-2-one (9b, 0.40 g, 1 mmol) on reduction with sodiumcyanoborohydride (0.12 g, 2 mmol) in the presence of catalytic amount of CH3COOH (3 drops) in methanol at 0° C. for 12 h. After completion of the reaction as indicated by TLC, the reaction mixture is neutralized with sodium bi carbonate and extracted into chloroform. The crude product thus obtained was purified by column chromatography using ethyl acetate-hexane (8:2) as eluant to obtain product 3-methyl-5-[1-(4-[(5-nitro-2-furyl)methyl]aminophenyl)-4-piperidyl]-2,3-dihydro-1,3,4-oxadiazol-2-one (10b, 343 mg, 86%).

Workup

  1. customAfter completion of the reaction
  2. extractionextracted into chloroform
  3. customThe crude product thus obtained
  4. customwas purified by column chromatography

Sources & evidence

ORD record
ord-cef4322ad6c94228bd62808f1211d5fd
Source dataset
uspto-grants-2015_08
Patent number
US09108960B2

Reaction notes

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