Pyridine → 4'-[2-Ethoxy-5-(hydroxyiminomethyl)-4-vinylimidazol-1-ylmethyl]biphenyl-2-carboxylic acid t-butyl ester

HRID 1802933Notes

Reaction equation

HRID 1802933 reaction equation
[C:1]([O:5][C:6]([C:8]1[C:9]([C:14]2[CH:19]=[CH:18][C:17]([CH2:20][N:21]3[C:25]([CH:26]=O)=[C:24]([CH:28]=[CH2:29])[N:23]=[C:22]3[O:30][CH2:31][CH3:32])=[CH:16][CH:15]=2)=[CH:10][CH:11]=[CH:12][CH:13]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].N1C=CC=CC=1.Cl.[NH2:40][OH:41]>O>[C:1]([O:5][C:6]([C:8]1[C:9]([C:14]2[CH:19]=[CH:18][C:17]([CH2:20][N:21]3[C:25]([CH:26]=[N:40][OH:41])=[C:24]([CH:28]=[CH2:29])[N:23]=[C:22]3[O:30][CH2:31][CH3:32])=[CH:16][CH:15]=2)=[CH:10][CH:11]=[CH:12][CH:13]=1)=[O:7])([CH3:2])([CH3:3])[CH3:4]

Participants

5

Reactant 3

HCID 1049PyridineHCID 443297Hydroxyamine hydrochlorideHCID 598309114'-(2-Ethoxy-5-formyl-4-vinylimidazol-1-ylmethyl)biphenyl-2-carboxylic acid t-butyl ester

Product 1

HCID 725729624'-[2-Ethoxy-5-(hydroxyiminomethyl)-4-vinylimidazol-1-ylmethyl]biphenyl-2-carboxylic acid t-butyl esterYield 78.2%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

Intermediate (17b) (4.3 g, 10 mmol) was dissolved in pyridine (40 mL, 500 mmol). Hydroxylamine hydrochloride (1.7 g, 25 mmol) was added, followed by the addition of water (20 mL, 1000 mmol). The mixture was stirred at room temperature overnight. Water (30 mL) was added and the mixture was stirred for 20 minutes. The precipitant was filtered off and dried to yield intermediate (17c) (3.5 g). MS m/z: [M+H+] calcd for C26H29N3O4, 448.2. found 448.3.

Workup

  1. stirringthe mixture was stirred for 20 minutes
  2. filtrationThe precipitant was filtered off
  3. customdried

Sources & evidence

ORD record
ord-42cedb2d92f04599b87f3a1618e300cd
Source dataset
uspto-grants-2013_01
Patent number
US08349875B2

Reaction notes

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