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cis – trans isomerization of 2‐(4‐pyridyl)‐substituted thiazolidine‐4‐carboxylic acids: pH dependence by 1 H and 13 C NMR
Author(s) -
Ponticelli Fabio,
Marinello Enrico,
Missale Maria Cristina
Publication year - 1982
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270200304
Subject(s) - thiazolidine , chemistry , isomerization , cis–trans isomerism , carbon 13 nmr , cysteine , nuclear magnetic resonance spectroscopy , pyridoxal , medicinal chemistry , stereochemistry , chemical shift , organic chemistry , phosphate , catalysis , enzyme
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 1 H and 13 CNMR spectroscopy. Fast interconversion of isomers occurs in neutral or alkaline solution.