Synthetic Studies Towards the Indole Alkaloid Tacamine. Part 4. Total Syntheses of Tacamine-Type Indole Alkaloids of Tabernaemontana eglandulosa. -Seven alkaloids (VI)-(VIII), (XII), and (XIV)-(XVI) are prepared via epimerization of the ester (II). However, attempted synthesis of the alkaloid (±)-19
Total synthesis of the indole alkaloid (±)-tacamine
✍ Scribed by Mauri Lounasmaa; David Din Belle; Arto Tolvanen
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- French
- Weight
- 255 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0040-4039
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📜 SIMILAR VOLUMES
The tetrahedrane framework with R=tBu and the octabisvalene framework with R = CH3 presumably form because of steric reasons. Whereas the hydrocarbon 2 is highly strained, the arrangement in 1 is largely strain-free, based on the intermolecular contact distances. With other residues R the occurrenc
## Abstract The synthesis of aldehyde intermediates suitable for the preparation of indole alkaloids of the tacamine (1) type is described. The four possible aldehydes 4–7 were prepared from methyl 5‐ethylnicotinate (8) in a few simple steps using a base‐catalyzed epimerization as the final step (_