Ammonium formate → N1,5-Dimethylbenzene-1,2-diamine

To a solution of methyl-(5-methyl-2-nitro-phenyl)-amine (2.47 g, 14.9 mmol), ammonium formate (15 g, 237.9 mmol) in THF (7 mL) and MeOH (35 mL) at room temperature was added 10% Pd/C (650 mg) and the resulting mixture was stirred at room temperature for 10 min. The resulting mixture was then filtered over CELITE® and concentrated in vacuo. The resulting residue was diluted with CH2Cl2, washed with H2O and the organic layer was dried over Na2SO4, filtered, and concentrated in vacuo. The resultant residue was purified by flash column chromatography (SiO2), eluting with a hexanes-EtOAc gradient to yield 4,N2-dimethyl-benzene-1,2-diamine.

1. filtrationThe resulting mixture was then filtered over CELITE®
2. concentrationconcentrated in vacuo
3. additionThe resulting residue was diluted with CH2Cl2
4. washwashed with H2O
5. dry with materialthe organic layer was dried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe resultant residue was purified by flash column chromatography (SiO2)
9. washeluting with a hexanes-EtOAc gradient

ORD-Eintrag

ord-1ee2412d763d4b10be6c83681387a85b

Quelldatensatz

uspto-grants-2013_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08450497B2