Pyridine → HCID 178429133, compound

HRID 1486883Notes

Reaction equation

HRID 1486883 reaction equation
Cl.[NH:2]([C:6]1[CH:14]=[CH:13][C:9]([C:10](Cl)=[O:11])=[CH:8][CH:7]=1)[C:3]([NH2:5])=[NH:4].[C:15]([O:19][C:20](=[O:42])[CH2:21][C:22]1([C:35]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])=[O:36])[O:26][N:25]=[C:24]([C:27]2[CH:32]=[C:31]([CH3:33])[CH:30]=[C:29]([OH:34])[CH:28]=2)[CH2:23]1)([CH3:18])([CH3:17])[CH3:16].N1C=CC=CC=1.C(=O)(O)[O-].[Na+]>O.C(#N)C.CN1C(=O)CCC1>[C:15]([O:19][C:20](=[O:42])[CH2:21][C:22]1([C:35]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])=[O:36])[O:26][N:25]=[C:24]([C:27]2[CH:32]=[C:31]([CH3:33])[CH:30]=[C:29]([O:34][C:10](=[O:11])[C:9]3[CH:8]=[CH:7][C:6]([NH:2][C:3]([NH2:5])=[NH:4])=[CH:14][CH:13]=3)[CH:28]=2)[CH2:23]1)([CH3:17])([CH3:18])[CH3:16]

Participants

7

Reactant 4

HCID 1049PyridineHCID 516892Sodium BicarbonateHCID 118292757tert-Butyl 5-(2-tert-butoxy-2-oxoethyl)-3-(3-hydroxy-5-methylphenyl)-4,5-dihydro-1,2-oxazole-5-carboxylateHCID 178479379HCID 178479379, compound2×

Product 1

HCID 178429133HCID 178429133, compoundYield 57.7%

Reagents, catalysts & solvents 2

HCID 13387N-methyl-2-pyrrolidoneSolventHCID 18373917Acetonitrile--water (1/1)Solvent

Procedure

4-Carbamimidamidobenzoyl chloride hydrochloride (299 mg) was added to a mixture of tert-butyl 5-(2-tert-butoxy-2-oxoethyl)-3-(3-hydroxy-5-methylphenyl)-4,5-dihydro-1,2-oxazole-5-carboxylate (500 mg), pyridine (0.6 mL), and NMP (0.6 mL) at 50 C, and the obtained mixture was stirred at 50 C for 30 minutes. Further, 4-carbamimidamidobenzoyl chloride hydrochloride (299 mg) was added thereto, and the obtained mixture was stirred at 50 C for 3 hours. The reaction mixture was fractionated by HPLC (C18, mobile phase: water/acetonitrile (system containing 0.1% TFA)). To the obtained fraction, a saturated aqueous solution of sodium bicarbonate was added, followed by extraction with ethyl acetate. The extract was dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure to obtain the title compound (407 mg).

Workup

  1. stirringthe obtained mixture was stirred at 50 C for 3 hours
  2. extractionfollowed by extraction with ethyl acetate
  3. dry with materialThe extract was dried over anhydrous magnesium sulfate
  4. distillationthe solvent was distilled off under reduced pressure

Sources & evidence

ORD record
ord-0a7c94c110ea492987e0904b80c5fec7
Source dataset
uspto-grants-2016_08
Patent number
US09428470B2

Reaction notes

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