Gerhard Laus
J. Chem. Soc., Perkin Trans. 2, 1998, 315-318
DOI:
10.1039/A705871C,
Paper
The effects of temperature, pH and solvent polarity on the rate of isomerization and the equilibrium composition of the tetracyclic spiro oxindole alkaloids rhynchophylline, isorhynchophylline, corynoxeine and isocorynoxeine have been investigated.