✦ LIBER ✦
Spektrophotometrische Bestimmung kation- und anionaktiver Bestandteile von Arzneimitteln nach Ionenpaarextraktion an Inertträgern Spectrophotometric
✍ Scribed by Jutta Riedl; Friedrich Moll
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 170 KB
- Volume
- 318
- Category
- Article
- ISSN
- 0365-6233
No coin nor oath required. For personal study only.
✦ Synopsis
A solution of 2.0 g (0.01 mol) of 1 in 30 ml of DMF was treated with 3.0 ml(0.02 mol) of 2d and stirred at room temp. for 30 min. The precipitate was washed with DMF to give 1.8 g (60 %) of crude product 4, mp. 193-198", vco 1720cm-', mol. mass294 (ms). 1.8 g (6 mmol) 4 was dissolved in 16 ml of glacial acetic acid and refluxed for 4 h. After cooling, the solid product was recrystallized from acetic acid to yield 1.4 g (R5 %) of yellow needle crystals, mp. 292-294'. UV (MeOH): hmax (log E)