Indole alkaloids. XXI: a revised structure for geneserine.

SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Contribution à la connaissance des alcaloïdes indoliques. Alcaloïdes de Conopharyngia jollyana

Doctorat en Sciencesinfo:eu-repo/semantics/nonPublishe

Myricoidine and dihydromyricoidine, two new macrocyclic spermidine alkaloids from clerodendrum myricoides

Two new spermidine alkaloids, myricoidine 1 and dihydromyricoidine 2 have been isolated from Clerodendrum myricoides (Verbenaceae) and their structures established by a study of their spectral and chemical properties. © 1988.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Hydroboration of enecarbamates and the synthesis of β-hydroxypiperidine alkaloids

The β-hydroxypiperidine alkaloids 5, 6 and 8 were diastereoselectively synthesized using hydroboration of enecarbamates 2b-c as a key step.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Alcaloïdes Indoliques. XIX. Un Nouvel Exemple D'empêchement a la Libre Rotation Dans des Dérivés Dihydroindoliques N‐Formylés

The proton magnetic resonance spectra of some N‐formyl dihydroindole derivatives have been investigated. The data are best rationalized on the basis of a hindered rotation about the N–CHO bond. The attribution of the signals to each conformation is obtained from the chemical shifts in the low field region and from the pattern of the aromatic protons. Copyright © 1969 Wiley‐VCH Verlag GmbH & Co. KGaA, WeinheimSCOPUS: ar.jinfo:eu-repo/semantics/publishe

A revised structure for the piperidine alkaloid andrachamine

A new method for the synthesis of trans-2,6-disubstituted piperidine derivatives is described. The transformation of cyclic α-methoxycarbamates 5 and 6 affords trans ketones 17 and 18. The synthesis of diols 1-4 from 17 and 18 has shown that the structure proposed in the literature for the piperidine alkaloid andrachamine is incorrect. A reexamination of the original spectral data of this alkaloid suggested that it is a meso 2,6-disubstituted piperidine derivative. Unambiguous syntheses of 23 and 24 and comparison with a sample of andrachamine have established that this alkaloid possesses structure 23.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Myrtine and epimyrtine, quinolizidine alkaloids from vaccinium myrtillus

The structures (including conformation and absolute configuration) of myrtine and epimyrtine, quinolizidine alkaloids from Vaccinium myrtillus, are reported. The two bases are obtainable from pelletierine by Mannich condensation with acetaldehyde, or can be derived stereospecifically by 1,4-nucleophilic addition to enaminones. They have been resolved with tartaric acid. The isomerization of myrtine is discussed. © 1981.SCOPUS: ar.jinfo:eu-repo/semantics/publishe