Triethylamine → 1-{[(2-Chloro-5,6-dimethyl-3-nitropyridin-4-yl)amino]methyl}cyclohexanol

Temperatur

0 °C

A 500 mL round bottom flask was charged with 2,4-dichloro-5,6-dimethyl-3-nitropyridine (6.00 g, 27.1 mmol), 1-aminomethyl-1-cyclohexanol hydrochloride (4.94 g, 29.8 mmol), and N,N-dimethylformamide (200 mL). The solution was cooled to 0° C. and triethylamine (8.31 mL, 59.6 mmol) was added dropwise. The solution was heated to 35° C. for 3 d. The volatiles were removed under reduced pressure and the resulting oil was partitioned between dichloromethane (300 mL) and water (50 mL). The organic layer was washed with water (50 mL) and brine (30 mL), dried over MgSO4, filtered, concentrated under reduced pressure, and dried under vacuum to yield 1-{[(2-chloro-5,6-dimethyl-3-nitropyridin-4-yl)amino]methyl}cyclohexanol that was used without further manipulation in the next step.

1. temperatureThe solution was heated to 35° C. for 3 d
2. customThe volatiles were removed under reduced pressure
3. customthe resulting oil was partitioned between dichloromethane (300 mL) and water (50 mL)
4. washThe organic layer was washed with water (50 mL) and brine (30 mL)
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customdried under vacuum

ORD-Eintrag

ord-d1ae9220338b41868267a8a9e8f654d9

Quelldatensatz

uspto-grants-2011_02

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07884207B2