## Abstract The enzymes responsible for the metabolism of methylated xanthines suah as theophylline, theobromine, and caffeine have until now escaped identification (1, 2). However, a sensitive radiometric method of analysis of theophylline metabolism (3) was made possible by the synthesis and puri
Synthesis and purification of propyne-3-14C
โ Scribed by Dale C. Myers; F. Schmidt-Bleek
- Publisher
- John Wiley and Sons
- Year
- 1967
- Tongue
- French
- Weight
- 137 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
The synthesis of 14C-labeled menthol was accomplished by preparation of 14C-labeled (&) pulegone. Catalytic hydrogenation and chemical reduction converted (&) pulegone to the isomeric menthols possessing 1.10 mCi total activity. Gas chromatographic separation of this material gave the relative abund
## Abstract Pentylenetrazoleโ10โ^14^C was synthesized by reacting hydrazoic acid with cyclohexanoneโ1โ^14^C. Purification was carried out using sublimation and thick layer chromatography. Proof of radiochemical purity was determined using thin layer chromatography and autoradiography. The specific
## Abstract Pentachlorophenolโ^14^C~6~ was synthesized by chlorinating phenolโ^14^C~6~ using aluminum chloride as a catalyst. Purification of the labeled pentachlorophenol involved the precipitation of the labeled product from an aqueous alkali solution with hydrochloric acid and two sublimations.
14C N-2-hydroxyethyl-N-nitrosourea was prepared at a specific activity of 30 mCi/mmol and 1 . 2 9 mCi/mmol by a two-step synthetic sequence using 14C ethanolamine as the labelled precursor. Its puri-fication was performed by IiPLC using a Lichrosorb-DIOL column eluted by ethyl ether.The overall radi
## Abstract Org 37462 (1) is the active ingredient in Orgalutran^ยฎ^, an innovative product that reduces the time of treatment in __in vitro__ fertilization from four to less than two weeks. Org 37462 is a synthetic decapeptide containing several amino acids that are unnatural in stereochemistry and