Phytochemistry p. 859 - 862 (1984)
Update date:2022-08-22
Topics:
Borges-Del-Castillo, Juan
mArtinez-Martir, Ana I.
Rodriguez-Luis, Francisco
Rodriguez Ubis, Juan C.
Vazquez-Bueno, Purificacion
Two new coumarin isomers have been isolated from Melampodium divaricatum and identified by spectral procedures as 8-hydroxy-7-(3'-methyl-2'-butenyloxy)coumarin (1) and 7-hydroxy-8-(3'-methyl-2'-butenyloxy)coumarin (2).The regioselective synthesis of each isomer was made by two different alkylation pathways confirming their structures.Key Word Index - Melampodium divaricatum; Heliantheae; Compositae; new coumarins; NMR; synthesis.
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