SCHEDULED MAINTENANCE
The general ethoxalylation procedure for the synthesis of isoflavones has been applied to the synthesis of irigenin (VII) and tectorigenin (XVI). This synthetic route also yields the isomers, ψ-irigenin (XI) and ψ-tectorigenin (XX). Information concerning the product ratio in certain ethoxalylation reactions and the relative thermodynamic stabilities of 5,6,7- and 5,7,8-trisubstituted isoflavones is discussed.
W. Baker, D. F. Downing, A. J. Floyd, B. Gilbert, W. D. Ollis and R. C. Russell, J. Chem. Soc. C, 1970, 1219 DOI: 10.1039/J39700001219
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