Synthesis of <i>trans</i>-2,3-dimetho×y-3- (phenylamino)flavanones and related compounds
摘要:
trans-2,3-Dimethoxy-3-(phenylamino)flavanones (2), a new type of flavanone derivatives, are synthesized from flavanones or 2'-hydroxychalcones in two steps, the first one being a condensation with nitrosobenzenes (Ehrlich-Sachs reaction) and the second an oxidation with (diacetoxyiodo)benzene in methanol. Nitrone formation, an important side reaction of the Ehrlich-Sachs reaction, has also been exploited to synthesize 2 simply by use of an excess of nitrosobenzene in aqueous methanol. Syntheses of several analogues of 2 are also reported.
[EN] FLAVONES AND COUMARINS AS AGENTS FOR THE TREATMENT OF ATHEROSCLEROSIS<br/>[FR] FLAVONES ET COUMARINES UTILISEES EN TANT QU'AGENTS DANS LE TRAITEMENT DE L'ATHEROSCLEROSE
申请人:——
公开号:WO1996031206A2
公开(公告)日:1996-10-10
[EN] Flavones and coumarins or a pharmaceutically acceptable salt thereof are inhibitors of VCAM-1 and ICAM-1 and are thus useful in the treatment of atherosclerosis, restenosis, and immune disorders such as arthritis and transplant rejection. [FR] Les flavones et les coumarines ou leurs sels pharmaceutiquement acceptables sont des inhibiteurs de VCAM-1 et ICAM-1 et sont donc utiles dans le traitement de l'athérosclérose, de la resténose et de troubles immunitaires tels que l'arthrite et le rejet des transplantations.
Synthesis of <i>trans</i>-2,3-dimetho×y-3- (phenylamino)flavanones and related compounds
作者:Surya K. De、Mrinal G. Dhara、Asok K. Mallik
DOI:10.1139/cjc-76-2-199
日期:——
trans-2,3-Dimethoxy-3-(phenylamino)flavanones (2), a new type of flavanone derivatives, are synthesized from flavanones or 2'-hydroxychalcones in two steps, the first one being a condensation with nitrosobenzenes (Ehrlich-Sachs reaction) and the second an oxidation with (diacetoxyiodo)benzene in methanol. Nitrone formation, an important side reaction of the Ehrlich-Sachs reaction, has also been exploited to synthesize 2 simply by use of an excess of nitrosobenzene in aqueous methanol. Syntheses of several analogues of 2 are also reported.