
TY  - JOUR
A1  - Knox, JR 
A1  - Slobbe, J 
T1  - Indole alkaloids from <I>Ervatamia orientalis</I>. II. The constitution of the ervatamine group
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1975
VL  - 28
IS  - 8
SP  - 1825
EP  - 1841
KW  - 
UR  - https://doi.org/10.1071/CH9751825 
N2  - This paper describes the combination of physical and chemical degradative methods that has led to the elucidation of the constitution of the novel 2-acylindole alkaloids, ervatamine (5), 20-epi-ervatamine (6) and 19-dehydroervatamine (7). The alkaloids show differences in the N.M.R. spectra and in the rates of methylation which indicate that ervatamine has a different conformation from the other two alkaloids; the conformations which are suggested for the alkaloids (35)-(37) have alternative chair conformations of the piperidine rings. Correlations in the mass spectra of the natural alkaloids and of several simple derivatives are discussed. 
ER  -

