Please tell me if there is any in order to distinguish the spectra of terpenoids and steroids.
Dear Balaji
I hope attached pdf can be helpful
do not forget to up vote if problem solved
Dear Balaji
I hope attached pdf can be helpful
do not forget to up vote if problem solved
Yes is depend on each family but you can also check Breitmaier´s book 13C NMR Spectroscopy , there are a lot of tables on different natural products classified by types.
The important information is methyl carbon signals
If the methyl carbon signals from
(5-7) peaks >>>> may be steroids
(3-5) peaks >>>> may be triterpenoids
(1-3) peaks >>>> may be diterpenoids
Also all data must be revised with published in your similar compounds
Yes I agree with Anna, see : E. Breitmaier and W. Voelter. Carbon-13 NMR spectroscopy. VCH, Weinheim, 3rd Edition, 1987
a single 13 C nmr chemical shift would be non-predictive
if you, however want to identify a known natural product or find nextsimilar structures,
http://nmrpredict.orc.univie.ac.at/similar/eval.php
is a quite useful tool, does´t work well for new scaffolds but otherwise is quite concise
Characteristic peaks for terpenoids and steriods are generally depends on its structural diversity. Most important things in the structural elucidation of terpeniods are the presence of alcoholic and methyl attachments and total number of carbon atoms. Info about double bonds and other attachments along with HSQC and HMBC experiments will answer ur question bro.....
- Badges
- Science topic