Dimethylamine → 3-Amino-N,N-dimethyl-4-nitroaniline

Temperatur

90 °C

To a solution of 5-chloro-2-nitroaniline (4.14 g, 24.0 mmol) in ethanol (62 ml) in a sealed thick-walled tube, was added aqueous 40% dimethylamine solution (22.5 ml, 178 mmol, 7.4 eq) and the mixture heated in a 90° C. oil-bath for 2 days (CAUTION: High pressure). After cooling, additional 40% dimethylamine solution (7.5 ml) was added and heating continued for a further 3 days. The reaction mixture was cooled to room temperature and the contents were tipped onto ice (250 ml). After stirring the suspension was filtered, washed with water (200 ml) and dried under vacuum to give 5-dimethylamino-2-nitroaniline as a bright yellow solid (4.16 g, 96%), mp 138.5-139.8° C. (lit. (8) mp 140° C.).

1. temperatureAfter cooling
2. temperatureheating
3. temperatureThe reaction mixture was cooled to room temperature
4. filtrationwas filtered
5. washwashed with water (200 ml)
6. customdried under vacuum

ORD-Eintrag

ord-dc3d02c093834155bc6c1f51c859e3aa

Quelldatensatz

uspto-grants-2015_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08999993B2