A simplified biological synthesis of labeled cholesteryl esters
✍ Scribed by Himanshu V. Kothari; Janet S. Carlton; David Kritchevsky
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- French
- Weight
- 206 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
A simplified procedure is described for the synthesis and purification of labelled cholesteryl esters. The esters are synthesized enzymatically from (4‐^14^C) cholesterol and free fatty acids.
The separation of the lipids from aqueous medium is simplified by lyophilizing the reaction mixture at equilibrium. The lipid components of the freeze‐dried powder are separated by silicic acid chromatography. The radiochemical purity of the product was shown to be greater than 98%.
📜 SIMILAR VOLUMES
w-[ 1251]Iodoundecyl choleeteryl ether has been synthesized via a hydroboration-iodination sequence. The syntheses can be used to prepare high specific activity (no-carrier-added) reagents.
A two-step s y n t h e s i s of t h r e e carbonate and f o u r carbamate esters l a b e l e d a t t h e carbonyl with c a r n-14 i s described. The method u t i l i z e s t h e r e a d i l y a v a i l a b l e [' %I -phosgene which i s f i r s t converted t o an i s o l a b l e [14C] -labeled a l k
## Abstract Fluphenazine labelled with ^14^C at the 3‐propyl position was prepared. Starting from K^14^CN, 3‐chloropropyl p‐toluenesulfonate (7) was synthesized via 3‐chloropropionic acid (4) intermediate and coupled with 2‐trifluoromethylphenothiazine. The phenothiazine derivative (8) obtained was