## Abstract [4‐^14^C]‐(25R)‐Spirost‐5‐en‐3β‐ol(diosgenin)__l__, specific activity 3.77 ± 0.02 mCi/mmole, was synthesized in four stees from (25R)‐5‐hydroxyspirost‐5‐en‐3‐oic‐3,5‐lactone 4 and [^14^C] methyl magnesium iodide with an overall yield of 18%. The preparation of the starting lactone from
Synthesis of kryptogenin-26-14C and diosgenin-26-14C
✍ Scribed by Raymond D. Bennett; Horst H. Sauer; Erich Heftmann
- Publisher
- John Wiley and Sons
- Year
- 1969
- Tongue
- French
- Weight
- 444 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Kryptogenin-26-I4C (13) was synthesized from dihydrodiosgenin diacetate (1). The radioactive carbon atom was introduced by the Arndt-Eistert method, and the extra carbon atom was then removed by a carboxy-inversion reaction. Diosgenin-26-I4C (14) was prepared by reduction of kryptogenir~-26-~~C.
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