C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
204/43.5
C25B 3/02 (2006.01)
Patent
CA 1187835
ABSTRACT OF THE DISCLOSURE: The present invention is directed to a method for the preparation of compounds of the general formula: Image wherein A Image denotes and R2 denotes a lower alkyl group, a -CH2C6H5 group or a -CH2C6H4OCH3 group; R3 is a halogen atom ; R4 is a lower alkyl group, R5 is HClO4 or other organic or inorganic acid X = H2 Y = O or X = O Y = H2 or X = H2 Y = H2 wherein diphenolic compounds of the general formula: Image wherein R1 denotes a lower alkyl group, a -CH2C6H5 group or a -CH2C6H4OCH3 group; A, R2 and R3 have the above mentioned meanings, are subjected to electrochemical oxidation at an anode potential of 1.1 to 1.7V in the presence of an organic solvent and a conductive salt. The so obtained narwedine-type enones are used as starting mate- rials for the synthesis of Amaryllidaceae alkaloids.
340108
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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