Ram Labhaya Sethi
Articles written in Proceedings – Section A
Volume 27 Issue 3 March 1948 pp 240-243
6-Bromo-piperonal has been condensed with malonic acid and gives two different products; 6-bromo-piperonyl-acrylic acid (the highest yield being quantitative) and 6-bromo-piperonyl-malonic acid (the highest yield being 72%). The presence of pyridine gives the first, that of glacial acetic acid gives the second.