An improved procedure for retro-cycloaddition of adducts from steroidal 5,7-dienes and 4-phenyl-1,2,4-triazoline-3,5-dione
โ Scribed by Kubodera, Noboru; Miyamoto, Katsuhito; Watanabe, Hiroyoshi; Kato, Masahiro; Sasahara, Kazuo; Ochi, Kiyoshige
- Book ID
- 125969164
- Publisher
- American Chemical Society
- Year
- 1992
- Tongue
- English
- Weight
- 272 KB
- Volume
- 57
- Category
- Article
- ISSN
- 0022-3263
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A Convenient Method for Retro-Cycloaddition of Adducts from Steroidal 5,7-Dienes and 4-Phenyl-1,2,4-triazolidine-3,5-dione and Application to the Syntheses of Biosynthetic Intermediates of Ergosterol. -A novel method for the deprotection to the 5,7-diene system in steroids is developed which is als
In a continuing study of cycloaddition reactions involving cyclopropane ring-containing systems (1) we have investigated the reactions of vinylcyclopropane and some substituted vinylcyclopropanes with 4-phenyl-1,2,4-triazoline-3,5-dione (PTAD) and chlorosulfonylisocyanate (CSI).