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.
Synthesis of [4-14C]diosgenin
โ Scribed by E. S. Ferdinandi
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- French
- Weight
- 211 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0022-2135
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โฆ Synopsis
Abstract
[4โ^14^C]โ(25R)โSpirostโ5โenโ3ฮฒโol(diosgenin)l, specific activity 3.77 ยฑ 0.02 mCi/mmole, was synthesized in four stees from (25R)โ5โhydroxyspirostโ5โenโ3โoicโ3,5โlactone 4 and [^14^C] methyl magnesium iodide with an overall yield of 18%. The preparation of the starting lactone from diosgenin is also described.
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