An unexpected rearrangement-hydration reaction sequence of 2H-chromenes to dihydrochalcones under catalysis of HAuCl4
摘要:
2-Aryl-2H-chromenes in aqueous DCM medium under catalysis of HAuCl4 are converted into 3-(2-hydroxyaryl)-1-arylpropan-1-ones through hydration-rearrangement reaction sequence in very good yield. The key step probably involves the [1,5] hydride shift followed by the hydrolysis under the reaction condition. The notable advantages of this method are operational simplicity and ease of isolation of products and also provide a pathway to convert the chalcone into DHCs with the transposition of carbonyl group. (C) 2012 Elsevier Ltd. All rights reserved.
[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.