Reaktion #60191

Reaktionsgleichung

chloropyridine

ethyl 6-chloro-2-phenylpyridine-3-carboxylate

{2-[(6-amino-5-nitro(2-pyridyl))amino]ethyl}[6-(2,4-dichlorophenyl)-5-imidazolyl(2-pyridyl)]amine

DDQ

ethyl 3-(2,4-dichlorophenyl)-3-oxopropanoate

→

final product

ethyl 2-(2,4-dichlorophenyl)-6-({2-[(5-nitro(2-pyridyl))amino]ethyl}amino)pyridine-3-carboxylate

Lösungsmittel

CH3CN

THF ethanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeat 120° C.
2. 2
   Sonstigefor 18 hours

Vorschrift

Ethyl 2-(2,4-dichlorophenyl)-6-({2-[(5-nitro(2-pyridyl))amino]ethyl}amino)-pyridine-3-carboxylate was prepared from ethyl 3-(2,4-dichlorophenyl)-3-oxopropanoate (ref Wemple, J.; et. al. Synthesis 1993, 290-292.) as the starting material and THF/ethanol ratio of 3:1 as the solvent in the first step. The oxidation uses DDQ. The final product is achieved directly from the chloropyridine by reacting ethyl 6-chloro-2-phenylpyridine-3-carboxylate with 2-(2-aminoethylamine)-5-nitropyridine in CH3CN and Hüing's Hüing's base at 120° C. for 18 hours. The procedures are analogous to the general method for {2-[(6-amino-5-nitro(2-pyridyl))amino]ethyl}[6-(2,4-dichlorophenyl)-5-imidazolyl(2-pyridyl)]amine.

Quelle