Journal of the Chemical Society. Perkin transactions II p. 195 - 198 (1988)
Update date:2022-08-11
Topics:
Miles, Christopher O.
Main, Lyndsay
The pH-rate profile for the title reaction has been determined and accounted for in terms of contributions from the various ionised species.The effect of ionisation of a chalcone 4-OH group on rate of cyclisation is quantitatively accommodated for the first time.The rate data have been used to calculate the position of the equilibrium and its rate of attainment as a function of pH, and this information should be general value for optimising conditions for synthesis of 2',4,6'-trihydroxychalcones by ring-opening 4',5-dihydroxyflavones.
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