[Synthesis of alpha-chrysanthemylmethyl-gamma- and delta-lactones with cytostatic activity]. / Synthese von alpha-Chrysanthemylmethylen-gamma- und delta-Lactonen mit zytostatischer Wirkung.

The synthesis of the alpha-chrysanthemylmethylen-gamma- and delta-lactones 7-9, 11, 12 from the lactones 1-3, 5 and that of 10 from 2-oxo-chroman (4) and the aldehyd 6 is described. The compounds 7-9 and 11, 12 show cytostatic activity.