Oe~trone-4-~~C in dimethyl sulphoxide solutioii has been treated with lithium acetylide (ethylene diamine complex) to give ethynyl-oestradi01-4-~~C. ## INTRODUCTION. Ethynyloestradiol-4-14C of specific activity 40 pc/mg was required for clinical evaluation. Although the preparation of ethynyloest
Preparation of quercetin-4-14C
✍ Scribed by Carl A. Elliger
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- French
- Weight
- 249 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0022-2135
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## Abstract A selective and quantitative method was developed for a microscale preparation of 4‐thiouracil‐2‐^14^C by the direct thiation of uracil‐2‐^14^C. From pyridine, dioxane, and tetralin as the thiation solvents, the best yield was obtained in dioxane (96.6% of 4‐thiouracil‐2‐^14^C). The sim