Reaktion #78127

Reaktionsgleichung

3-chloro-N-(4-chlorophenyl)pyridine-4-carboxamide

1-(4-pyridyl)piperidine-4-methylamine

dimethylformamide

hydrogen sulfide

→

title compound

Ausbeute 13.0%

N-(4-chlorophenyl)-2-[1-(4-pyridyl)piperidin-4-ylmethyl]aminopyridine-3-carboxamide

Ausbeute 13.0%

Lösungsmittel

MeOH

Reaktionsbedingungen

Aufarbeitung

1. 1
   Filtrationfiltered
2. 2
   Einengenconcentrated
3. 3
   workup.ADDITIONThe residue was treated with 6:1 chloroform
4. 4
   Sonstigeresulted
5. 5
   Temperaturheated
6. 6
   Temperaturat reflux for 0.1 h
7. 7
   Filtrationfiltered through diatomaceous earth
8. 8
   EinengenThe filtrate was concentrated
9. 9
   WaschenThe aqueous layer was washed with EtOAc (3×)
10. 10
    Trocknenthe combined extracts were dried (sodium sulfate)
11. 11
    Filtrationfiltered
12. 12
    Einengenconcentrated
13. 13
    SonstigeThe residue was purified by RPHPLC

Vorschrift

A mixture of 3-chloro-N-(4-chlorophenyl)pyridine-4-carboxamide (130 mg, 0.49 mmol), 1-(4-pyridyl)piperidine-4-methylamine (187 mg, 0.98 mmol), and copper(1) bromide (70 mg) in dimethylformamide (1 mL) was heated at 110° C. After 18 h, the mixture was diluted with MeOH, filtered, and concentrated. The residue was treated with 6:1 chloroform:water (10 mL) followed by MeOH until a homogenoeus solution resulted. The solution was treated with hydrogen sulfide(g), heated at reflux for 0.1 h, and filtered through diatomaceous earth. The filtrate was concentrated and the residue taken up in water, 1 N NaOH, and EtOAc. The aqueous layer was washed with EtOAc (3×), the combined extracts were dried (sodium sulfate), filtered and concentrated. The residue was purified by RPHPLC yielding 29 mg (13%) of the title compound as a hydrochloride salt.

Quelle