Hydrochloric Acid → N2-(2-(dimethylamino)ethyl)pyridine-2,5-diamine

Temperatur

80 °C

To a round bottom flask, charged with N1,N1-dimethyl-N2-(5-nitropyridin-2-yl)ethane-1,2-diamine (0.4 g, 1.90 mmol) from above, 5 mL of ethanol, 5 mL water followed by iron powder (0.416 g, 7.58 mmol) and ammonium chloride (0.402 g, 7.58 mmol). The resulting reaction mixture was heated at 80° C. for 3 hours. TLC analysis showed no acid remaining so the mixture was passed through a cellite cartridge to remove iron. The organic solution was concentrated under vacuo to give a brown oil residue. The resulting crude mixture was treated with hydrochloric acid (1 N) and washed with ethylacetate. The aqueous layer was basified to PH=10 using sodium carbonate and extracted with ethyl acetate and washed with brine and water. The organic layer was separated, dried (Na2SO4) and concentrated. The title product was obtained as a brown solid (0.23 g, 51% yield). MS m/z: 181.16 [M+H]+.

1. customThe resulting reaction mixture
2. customto remove iron
3. concentrationThe organic solution was concentrated under vacuo
4. customto give a brown oil residue
5. washwashed with ethylacetate
6. extractionextracted with ethyl acetate
7. washwashed with brine and water
8. customThe organic layer was separated
9. dry with materialdried (Na2SO4)
10. concentrationconcentrated

ORD-Eintrag

ord-f414028f87b747369422b55539d69449

Quelldatensatz

uspto-grants-2014_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08680139B2