Process for the preparation of optically active...

Details Process for the preparation of optically active... Process for the preparation of optically active...

C - Chemistry, Metallurgy

07

C

260/208

C07C 50/16 (2006.01) C07C 49/84 (2006.01) C07C 50/36 (2006.01) C07H 15/252 (2006.01)

Patent

CA 1076561

ABSTRACT OF THE DISCLOSURE Optically active anthracyclinones are prepared by reacting an optically active (-) 1,4-dimethoxy-6-hydroxy-6- acetyl-tetralin of formula II: Image (II) with a phthalic anhydride of formula IV: Image (IV) wherein: a) R1 is hydrogen and R2 and R3 are the same and are both hydrogen or methyl, methoxy, chlorine ox bromine; b) R2 and R3 are both hydrogen and R1 is methyl, methoxy, chlorine or bromine; c) R1 and R3 are both hydrogen and R2 is methoxy; in the presence of AlCl3 or AlBr3 and an alkali metal chloride at 130-180°C for 1 to 10 minutes.

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