Acetic Acid → Ethyl 1-(5-chloro-2-pyridinyl)-1H-imidazole-4-carboxylate

HRID 433635Notes

Reaction equation

HRID 433635 reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([Cl:8])=[CH:4][N:3]=1.[CH:9]([O:16][CH2:17][CH3:18])([O:13]CC)OCC.[N+:19]([CH2:22][C:23](OCC)=O)([O-])=O.[C:28](O)(=O)C>[Fe]>[CH2:17]([O:16][C:9]([C:22]1[N:19]=[CH:28][N:1]([C:2]2[CH:7]=[CH:6][C:5]([Cl:8])=[CH:4][N:3]=2)[CH:23]=1)=[O:13])[CH3:18]

Participants

6

Reactant 4

HCID 176Acetic Acid2×HCID 31214Ethyl orthoformate2×HCID 661742-Amino-5-chloropyridineHCID 69379Ethyl nitroacetate

Product 1

HCID 53752991Ethyl 1-(5-chloro-2-pyridinyl)-1H-imidazole-4-carboxylate

Reagents, catalysts & solvents 1

HCID 23925IronCatalyst

Procedure

Following the general method described in example 384, 2-amino-5-chloropyridine was reacted with triethyl orthoformate, ethyl nitroacetate and acetic acid followed by treatment with triethyl orthoformate, iron and acetic acid. After workup and chromatography the title compound was obtained as a beige crystalline solid. Mp. 163-164° C. (AcOEt), MS: m/e=252 (M+H+).

Sources & evidence

ORD record
ord-d6f0f3bc6ffc4872a3395895ca6eea0e
Source dataset
uspto-grants-2003_12
Patent number
US06667335B2

Reaction notes

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