Hydroxyamine hydrochloride → 5-(4-Chlorobutyl)-4-hydroxyimino-2-methyl-2,3,4,5-tetrahydropyrrolo[2,3-e][1,2]thiazine 1,1-dioxide

A suspension of 145 mg (0.5 mmol) of Compound 17, 104 mg (1.5 mmol) of hydroxylamine hydrochloride and 123 mg (1.5 mmol) of -sodium acetate in 15 ml of methanol was refluxed for 166 hours. The reaction mixture was concentrated under reduced pressure, followed by the addition of a half-saturated aqueous solution of potassium carbonate to the residue. The resulting mixture was extracted with chloroform (twice). The organic layer was washed with a saturated aqueous solution of sodium chloride, dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The residue was purified by chromatography on a silica gel column (eluent: chloroform), whereby 69 mg of the title compound were obtained (yield: 45%).

1. temperaturewas refluxed for 166 hours
2. concentrationThe reaction mixture was concentrated under reduced pressure
3. additionfollowed by the addition of a half-saturated aqueous solution of potassium carbonate to the residue
4. extractionThe resulting mixture was extracted with chloroform (twice)
5. washThe organic layer was washed with a saturated aqueous solution of sodium chloride
6. dry with materialdried over anhydrous sodium sulfate
7. concentrationconcentrated under reduced pressure
8. customThe residue was purified by chromatography on a silica gel column (eluent: chloroform)

ORD-Eintrag

ord-e3e499faece048a98382878539642fa3

Quelldatensatz

uspto-grants-2004_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06743913B2