b) OVW Palladium. Coleon J (25 nig) was shaken in 2-propanol (5 ml) with 10% palladium on charcoal (30 mg) under hydrogen for 4 h. The filtered solution was evaporated to give a yellow oil which was shown to be a complex mixture (TLC. on silica gel in chloroform). Three pale yellow bands, separated by TLC. (each < 1 mg) had identical UV.jV1S. (CH,OH) (qual.): 275, 400;(CH,OH/NaOH) (qual.) : 282, 515, b u t were not investigated further.
Absolute Konfiguration der enantiomeren a-Cyclogeraniumsauren, a-Cyclogeraniale, a-Jonone, y-Jonone, a-und s-Carotine Summary. By chemical correlation with inariool and ambrein the absolute configurations of the enantiomeric a-cyclogeranic acids, a-cyclogeranials. cc-ionones and aand 8-carotcncs have been elucidated. Einleitung . -Die vorliegende Arbeit erganzt und erweitert unsere vorlaufige Mitteilung von 1969 [5]. Die Zahl der strukturell bekannten Carotinoide durfte heute gegen 300 betragen. Von diesen sind mehr als 200 chiral. Zu Beginn dieser Arbeit war nodl von keineni einzigen Carotin die absolute Konfiguration bekannt. 1957 [6] und 1958 [7] syntheti-1) Diplomarbeit,
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