Ethanol, 2-amino-, 1-nitrate, nitrate (1:1) → N-cyano-N'-(2-nitroxyethyl)-3-furancarboximidamide

Methyl N-cyano-3-furancarboximidate (0.5 g, 3.3 mmol) was dissolved in methanol (10 ml), and 2-nitroxyethylamine nitrate (0.84 g, 5.0 mmol) and sodium methoxide (0.27 g, 5.0 mmol) were added. The mixture was stirred at room temperature for 26 hours. After the reaction was completed, the reaction solution was concentrated under reduced pressure, and the residue thus obtained was extracted with chloroform (60 ml×3). The chloroform layer was washed with water (100 ml), dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residual concentrate was subjected to chromatography on a silica gel column (WAKO GEL C-200, 20 g) eluting with chloroform-methanol (100:1). The eluted fractions were concentrated under reduced pressure and crystallized from methanol diethyl ether to give the title compound (0.06 g, 0.27 mmol, yield: 8%) as colorless crystals.

1. concentrationthe reaction solution was concentrated under reduced pressure
2. customthe residue thus obtained
3. extractionwas extracted with chloroform (60 ml×3)
4. washThe chloroform layer was washed with water (100 ml)
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated under reduced pressure
7. concentrationThe residual concentrate
8. washeluting with chloroform-methanol (100:1)
9. concentrationThe eluted fractions were concentrated under reduced pressure
10. customcrystallized from methanol diethyl ether

ORD record

ord-92579f5998ab46dcab9c4996f4755ee7

Source dataset

uspto-grants-1993_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05223508