Abstract
α‐Cyanocinnamate esters react with hydrazine to give initial products of conjugate addition that then undergo a fragmentation to give the azine of the carbonyl precursor to the starting ester, rather than intramolecular aminolysis to give the pyrazolidinone.
Acknowledgments
The financial support of the National Institutes of Health (Grant #1 R15 DA013578‐01), and the University of Wisconsin – Eau Claire Office of Research and Sponsored Programs is gratefully acknowledged.