Tetrahedron p. 2021 - 2025 (1981)
Update date:2022-08-30
Topics:
Osborne, A. G.
In the Pechmann reaction with malic acid, m-cresol and 3,4-xylenol give mixtures of alkylcoumarins containing about 10percent of the 5- and 5,6-isomers respectively. 7-Alkylcoumarins only are obtained from the reaction with ethylacetoacetate.A study of ortho-proximity effects on the 13C NMR of dimethylcoumarins is reported, and the results have been correlated with similar effects in other aromatic and heteroaromatic systems.
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