C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
204/43.5
C25B 3/02 (2006.01)
Patent
CA 1187834
ABSTRACT OF THE DISCLOSURE: The present invention relates to a method for the preparation of Image wherein A Image denotes R3 is a halogen atom, R4 is a lower alkyl group, R5 is HClO4 or other organic or inorganic acid; X = O, Y = H2 or X = H2, Y = O or X = H2, Y = H2 wherein diphenolic compounds of the general formula: Image wherein R3 and A have the above-mentioned meanings; and R1 and R2 are,independently,each a lower alkyl group , a -CH2C6H5 group or a -CH2C6H4OCH3 group, are subjected to electrochemical oxidation at an anode potential ranging from 1.1 to 1.7 volts in the presence of an organic solvent and a conductive salt. The so obtained narwedine-type dienones are of high purity and can give Amaryllidaceae alkaloids by subsequent chemical transformations.
340093
Hinova Maya H.
Krikoryan Dikran A.
Parushev Stoyan P.
Vlahov Radoslav Y.
Zagorova Maria S.
Edinen Centar Po Chimia
Robic Robic & Associes/associates
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