Über 11, 18‐dioxygenierte 17α‐Hydroxy‐progesterone. Über Steroide, 153. Mitteilung

Abstract

Volumen XLI, Fasciculus VI (1958) -No. 170-171 1561The molar extinction coefficient of the complex for the mercury triplet at 366 mp is 5~1 0~. The solutions follow the BEER law up to a concentration of 4~1 O -~ mole/l. Cobalt interferes, for it gives a colored complex which absorbs at the same wavelength.4. The chelate is insoluble in most organic solvents; it is soluble in dimethylformamide . 5.The precipitation of nickel should be made at a low temperature and in the presence of a slight excess of ammonia (final pH -8). Cobalt interferes but can be masked by ammonium oxalate. Nickel can therefore be determined in the presence of a tenfold amount of cobalt.

Photochemische Reaktionen 30. Mitteilung. Die UV.‐Bestrahlung von 3β‐Hydroxy‐11‐oxo‐lanostan

“…Die Identifikation desproduktes 13 rnit einemvergleichspraparat [7] erfolgte mittels Misch-Smp., 1R.-Spektrum und Diinnschichtchromatogramm. (12). 22 mg 11 in wenig Pyridin geldst wurden zu einer Aufschlammung von 30 mg CrO, in 3 ml Pyridin gegeben und drei Tage bei Zimmertemp.…”