87812-91-7

Upstream product

• 87812-94-0 (Z)-5-Benzyliden-4-hydroxy-2-oxo-3-pyrrolin-3-carbonsaeuremethylester 
• 87812-87-1 (E)-5-Benzyliden-1-methoxalyl-4-methoxy-2-oxo-3-pyrrolin-3-carbonsaeuremethylester 
• 87812-88-2 (E)-5-Benzyliden-4-methoxy-2-oxo-3-pyrrolin-3-carbonsaeuremethylester 
• 87812-89-3 (E)-5-Benzyliden-4-hydroxy-2-oxo-3-pyrrolin-3-carbonsaeuremethylester 
• 87812-93-9 (E)-5-Benzyliden-4-hydroxy-1-methoxalyl-2-oxo-3-pyrrolin-3-carbonsaeuremethylester 
• 79-37-8 oxalyl dichloride 
• 79208-32-5 5-benzylidene-2,5-dihydro-4-methoxy-2-oxo-1H-pyrrole-3-carboxylic acid methyl ester 

Relevant academic research and scientific papers

A Simple Procedure to Prepare the Labile Stereoisomers of 5-Benzylidenepyrrolin-2-ones

The known Z-isomers of some N-unsubstituted 5-benzylidenepyrrolin-2-ones (2, 10, 12) change the configuration upon heating with oxalylchloride.Methanolysis of the intermediate imides (6, 8, 9) yields the corresponding E-isomers. - Key words: 5-Benzylidenepyrrolin-2-ones, 5-Benzylidenetetramic Acids, cis-trans Isomerisation