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Geissoschizine Revisited - Definite Proof of Its Stereostructure. by Hiromitsu Takayama; Toshiyuki Watanabe; Hiroko Seki; Norio Aimi; Shin-ichiro Sakai is a Chemistry article available to read on EtoBox.
What is Geissoschizine Revisited - Definite Proof of Its Stereostructure. about?
By re-assignment and detailed analysis of the NMR spectra of geissoschizine (1) and its derivatives, the hitherto accepted confonner la was revised to another possibility lc that favored the trmquinolizidine form and the D-ring adopting twist boat form, in which the intramolecular hydrogen bonding between the enol hydroxyl and Nb function was present. Geissoschizine, first obtained as an acidic hydrolysis product of a dimeric indole alkaloid geissosperminel) and subsequently isolated from the Apocynaceae plants,z) plays an important role as a pivotal early biogenetic intermediates) of many skeletal type of indole alkaloids, such' as Corynanthe-Yohimbine, Strychnos, Aspidosperma, Iboga, Sarpagine, and Picraline groups, etc. By the spectroscopic analysi& as well as the
Who reads Geissoschizine Revisited - Definite Proof of Its Stereostructure.?
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- Author
- Hiromitsu Takayama; Toshiyuki Watanabe; Hiroko Seki; Norio Aimi; Shin-ichiro Sakai
- Publisher
- Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0040-4039)
- Published
- 1992
- Language
- EN
- Field
- Chemistry (Physical Sciences)