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The synthesis of 3-spirooxindole derivatives. Total syntheses of dl-formosanine, dl-isoformosanine, dl-mitraphylline and dl-isomitraphylline

โœ Scribed by Yoshio Ban; Naomasa Taga; Takeshi Oishi

Publisher
Elsevier Science
Year
1974
Tongue
French
Weight
245 KB
Volume
15
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

After we published the intramolecular cyclization of the oxindole iminoether,l Scott made a proposal claiming an important role of the oxindole alkaloid in the biosynthesis of various indole alkaloids. 2 Thus, attention was drawn to synthesize the pentacyclic oxindole alkaloids which are abundant in many stereoisomeric forms in the botanical kingdom. 3 A total synthesis of dl-formosanine

๐Ÿ“œ SIMILAR VOLUMES

The total syntheses of 2-deoxy-DL- and L
The total syntheses of 2-deoxy-DL- and L-riboses
โœ Gen Nakaminami; Masazumi Nakagawa; Sachiko Shioi; Yoko Sugiyama; Satoko Isemura; ๐Ÿ“‚ Article ๐Ÿ“… 1967 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 210 KB

We report herein the total synthe.ses of 2-deoxy-DL-and L-rlboses. As Illustrated in the following scheme, the Reformatsky reaction of ethyl bromoaoetate with aoroleln afforded the p-hydroxy eater (I) in a yield of 40-502, whloh was hydrolysed by means of aqueous potassium hydroxide to give the DL-a