mercure, on constate que cc sont les raies du groupe 1850 A, et les raies 1941,1971 et 2000 A qui sont surtout responsables de la production ci'ozone. Bien des arguments exposes ci-dessus ont pu 6tre d6duits des mesures effectu6es dans le laboratoire de spectroscopic L I'Universiti. de B&le, du Pro
Synthèse de la DL-Ephedrine (Hydroxyméthylène 14C)
✍ Scribed by Nguyen-Hoang-Nam; M. Herbert; Nguyen-Dat-Xuong; L. Pichat
- Publisher
- John Wiley and Sons
- Year
- 1968
- Tongue
- French
- Weight
- 439 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
✦ Synopsis
DL-ephedrine (hydroxymethylene IJC) lias heen prepared from
Ba'dCO3 by a 5 step synthesis. After 2 successive purijications by silicagel-partition column chromatography and by chroinatography on an ion exchange resin column AG 50 W-X2 DL-epliedritie (liydroxymethylene l a c ) HCl is obtained with a radioactive overall yield of 30 based on Ba14C03 (specijc activity : 17 mCijniM). The analysis by paper electrophoresis in sodium borate bufler at p H 9.2, in conjunction with the thin-layer and paper chroniatographies. enables control of radiochemical purity of DL-ephedrine 1".
( I ) Chercheur i 1'1.
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