摘要:
Starting from phenyl pyridazinyl ketones 1 and 3 various 1-phenyl 1-pyridazinyl-2-substituted ethenes (2 a-c, 4, 5 a, b, 6 a, b, 7-9) were prepared by Wittig-Horner- oder Wittig-type reactions. Configurational assignments of these novel compounds were achieved by NOE difference spectroscopy.