Chloroform → 1-(5-nitro-2-thienyl)-2-[2-(N,N-dimethylamino)ethoxy]ethanol

In 10 ml of methanol was dissolved 320 mg of 1-(5-nitro-2-thienyl)-1-acetoxy-2-[2-(N,N-dimethylamino)ethoxy]ethane. To the solution was added 1.27 ml of a 1N aqueous sodium hydroxide solution. The resulting mixture was stirred at room temperature for 1 hour. To the reaction mixture were added 40 ml of chloroform and 40 ml of water. The organci layer was separated and 30 ml of water was added thereto. The resulting mixture was adjusted to pH 2 with 6N hydrochloric acid. The aqueous layer was separated and 30 ml of chloroform was added thereto. The resulting mixture was adjusted to pH 11 with a 10% aqueous sodium hydroxide solution. The organic layer was separated, washed with water, and dried over anhydrous magnesium sulfate. The solvent was removed by distillation under reduced pressure. To the residue thus obtained were added 3 ml of methanol and 1 ml of a 5N dry hydrogen chloride-ethanol solution. The solvent was removed by distillation under reduced pressure. To the residue thus obtained was added 5 ml of ethanol. The resulting crystals were collected by filtration and dried to obtain 170 mg of 1-(5-nitro-2-thienyl)-2-[2-(N,N-dimethylamino)ethoxy]ethanol (compound No. 405).

1. customThe organci layer was separated
2. addition30 ml of water was added
3. customThe aqueous layer was separated
4. addition30 ml of chloroform was added
5. customThe organic layer was separated
6. washwashed with water
7. dry with materialdried over anhydrous magnesium sulfate
8. customThe solvent was removed by distillation under reduced pressure
9. customTo the residue thus obtained
10. customThe solvent was removed by distillation under reduced pressure
11. customTo the residue thus obtained
12. filtrationThe resulting crystals were collected by filtration
13. customdried

ORD-Eintrag

ord-5cdafc0866344bb4a0175ab5eeb8cf5e

Quelldatensatz

uspto-grants-1997_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05612381