Journal of the Chemical Society. Perkin transactions I p. 219 - 222 (1991)
Update date:2022-09-26
Topics:
Hormi, Osmo E.O.
Peltonen, Carita
Bergstroem, Riitta
o-Methoxybenzylidenemalonates 1, which are available from o-methoxybenzaldehydes and diethylmalonate, were hydrolysed to the dipotassium malonates 2.Treatment of the salts 2 with trifluoroacetic acid-trifluoroacetic anhydride gave the title coumarins by a demethylative ring-closure reaction in 60-80percent yield.
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