## Abstract Starting with catalytic tritiation of 3‐methoxy‐estra‐1,3,5(10),8,14‐pentaen‐17B‐01 (1) the preparation of 17B‐hydroxy‐[14α,15α ‐^3^H] estra‐4,9‐dien‐3‐one (5) is described. The dienone (5) was obtained with a specific activity of 400 GBq/mmol and a radiochemical purity better than 96%.
The synthesis and purification of 4-[14C]- and 7α[3H]-androsta-4,16-dien-3-one
✍ Scribed by M. Wilkinson; M. M. Coombs; D. B. Gower
- Publisher
- John Wiley and Sons
- Year
- 1970
- Tongue
- French
- Weight
- 521 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
The synthesis of radioactive androsta‐4,16‐dien‐3‐one from both 4‐[^14^C]‐ and 7α‐[^3^ H]‐testosterone has been achieved using modifications of a method due to Henbest. Contrarily to this earlier report, yields of purified androstadienone were approximately 6%. Other compounds, which may be ring D isomers, have been separated by column chromatography on silicic acid impregnated with silver nitrate. Labelled 17‐epitestosterone acetate is also formed in this reaction, and may be readily isolated.
📜 SIMILAR VOLUMES
## Abstract An improved synthesis of the tritium labelled form of the new pharmacon DIENOGEST is described. The [^14^α,15α‐^3^‐H]DIENOGEST was obtained with a specific activity of 51 Ci/mmol and a radiochemical purity > 98%.
## Abstract Oxidation of 5α‐cholest‐8(14)‐ene‐3β,7α,15α‐triol with silver carbonate‐celite gave 5α‐cholest‐8(14)‐ene‐7α,15α‐diol‐3‐one in 88% yield. Treatment of the latter compound with tritiated water under basic conditions gave a labeled product which was reduced with lithium tri‐__tert__‐butoxy
## Abstract 2‐Amino‐3,5‐dihydro‐7‐(3‐thienylmethyl)‐[6‐^14^C]‐4H‐pyrrolo [3,2‐d]pyrimidin‐4‐one monohydrochloride ([^14^C]Cl‐1000), a potent purine nucleoside phosphorylase inhibitor, was made in six steps from potassium [^14^C]cyanide. A key step was the reduction of a nitro and a nitrile group wi