METHOD FOR PREPARING SUBSTITUTED ANTHRAQUINONE AND APPLICATION TO THE PREPARATION OF RHEINS

摘要

PCT No. PCT/FR98/00189 Sec. 371 Date Oct. 2, 1998 Sec. 102(e) Date Oct. 2, 1998 PCT Filed Feb. 2, 1998 PCT Pub. No. WO98/33757 PCT Pub. Date Aug. 6, 1998The invention relates to a process for the preparation of substituted anthraquinones represented by the general formula (I): by Diels-Alder reaction between a 1,4-naphthoquinone of general formula (II): and an acyclic diene of formula (III): CH2=CR-CH=CH-OR3(III) followed by an oxidizing deprotection reaction by means of the Jones reagent, in order to obtain the substituted anthraquinone of general formula (I). Application to the preparation of rheins of use in pharmaceuticals.