| 摘要 |
NEW MATERIAL:A compound expressed by formula I [R<1> is a group expressed by formula II (A is lower alkylene; R<3> and R<4> are H, alkyl, cycloalkyl, heterocyclic group, etc.), -CONHR<5> (R<5> is H, alkyl, etc.), etc.; R<2> is OH, alkoxy or acyloxy] and salt thereof. EXAMPLE:Ethyl-4'-ethoxalyloxy-5,7-dihydroxy-2-isoflavoncarboxylate. USE:A carcinostatic agent and immunosuppressive agent. PREPARATION:A compound expressed by formula III (X<1> is halogen or organic sulfonic acid residue) is reacted with an amine expressed by formula IV in the presence of a base, e.g. pyridine or potassium carbonate, in an organic solvent to afford the aimed compound expressed by formula I (R<1> is a group expressed by formula II), etc. |
