Revised structures for pluviatilol, methyl pluviatilol and xanthoxylol (cas 111407-29-5) : General methods for the assignment of stereochemistry to 2,6-diaryl-3,7-dioxabicyclo[3.3.0]octane lignans

Add time:08/30/2019    Source:sciencedirect.com

The isolation and characterisation of methyl piperitol, (+)-epieudesmin and (+)-episesamin from the stem bark of Zanthoxylum acanthapodium is reported. The 1H and 13C NMR spectra are correlated with those of other known lignans and it is shown that 13C NMR shifts can be used to assign unambiguously the nature and configuration of the aryl groups in unsymmetrically substituted 2,6-diaryl-3,7-dioxabicyclo[3.3.0]octanes. Other less satisfactory methods which have in the past been used for this purpose are discussed and in particular the use of coupling constants to assign stereochemistry in this series is strongly criticised. Revised structures for pulviatilol, methyl pluviatilol (fargesin) and xanthoxylol (cas 111407-29-5) are proposed.

We also recommend Trading Suppliers and Manufacturers of xanthoxylol (cas 111407-29-5). Pls Click Website Link as below: cas 111407-29-5 suppliers

Prev:Original articleDevelopment and validation of simple RP-HPLC-PDA analytical protocol for Zileuton (cas 111406-87-2) assisted with Design of Experiments for robustness determination
Next:Synthesis of hydrogen phosphate anion-imprinted polymer via emulsion polymerization and its use as the recognition element of graphene/graphite paste potentiometric electrode)