
TY  - JOUR
A1  - Baron, ML 
A1  - Rae, ID 
A1  - Simmonds, PM 
T1  - The reaction of piperazine-2,5-dione with 2-formylbenzoic acid.
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1982
VL  - 35
IS  - 12
SP  - 2567
EP  - 2569
KW  - 
UR  - https://doi.org/10.1071/CH9822567 
N2  - Reaction of piperazine-2,5-dione with 2-formylbenzoic acid in the presence of triethylamine gives three products: 1-(3'-oxo-1',3'-dihydroisobenzofuran-1'-yl)piperazine-2,5-dione, its 1,4-bis analogue which had previously been identified as the 3,6-compound, and 2,2'-[3,6-dioxopiperazine-2,5-diylidenebis(methylidyne)]bis(benzoic acid). The latter compound is shown by 1H and 13C n.m.r, spectroscopy to be the Z,Z isomer. 
ER  -

