cis–trans isomerization of 2‐(4‐pyridyl)‐substituted thiazolidine‐4‐carboxylic acids: pH dependence by 1H and 13C NMR
- 1 November 1982
- journal article
- research article
- Published by Wiley in Magnetic Resonance in Chemistry
- Vol. 20 (3) , 138-140
- https://doi.org/10.1002/mrc.1270200304
Abstract
The presence of two diastereoisomeric thiazolidines obtained by the reaction of L‐cysteine or L‐cysteine ethyl ester and pyridoxal or pyridoxal‐5‐phosphate is demonstrated by 1H and 13CNMR spectroscopy. Fast interconversion of isomers occurs in neutral or alkaline solution.Keywords
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