Reaction of Chalcones with NBS, a Simple One Pot Synthesis of 2-Aroylbenzo[b]furanes
摘要:
A simple one pot synthesis of 2-aroylbenzo[b]furanes has been achieved by bromomethoxylation with NBS and subsequent treatment of the appropriately substituted 2-hydroxychalcones with sodium hydroxide.
Ortho effect in the fragmentation of 2-acetoxychalcones under electron impact
摘要:
Abstract2‐Acetoxychalcones decompose under electron impact conditions by loss of an acetoxy fragment to form flavylium ions. The effect is restricted to the ortho position and is reduced after hydrogenation of the chalcone double bond. The intense flavylium ion originates—as shown by specific labelling with 18O—from two different fragmentation lines: (a) direct loss of an acetoxy radical by cleavage of the phenolic ArO bond and (b) sequential elimination of ketene and a hydroxy radical.
Preparation of functional benzofurans and indoles via chemoselective intramolecular Wittig reactions
作者:Yu-Ting Lee、Yeong-Jiunn Jang、Siang-en Syu、Shu-Chi Chou、Chia-Jui Lee、Wenwei Lin
DOI:10.1039/c2cc33972b
日期:——
A general preparation of new types of benzofurans, benzothiophenes and indoles is realized via chemoselective intramolecular Wittig reactions with the corresponding ester, thioester and amide functionalities using in situ formed phosphorus ylides as key intermediates. The reaction conditions are very mild, and numerous Michael acceptors and commercially available acid chlorides can be applied very
[EN] AMINOALKYL SUBSTITUTED CHALCONES AND ANALOGUES AND DERIVATIVES THEREOF<br/>[FR] CHALCONES SUBSTITUÉES PAR AMINOALKYLE ET ANALOGUES ET DÉRIVÉS ASSOCIÉS
申请人:UNIV FREE STATE ZA
公开号:WO2011151789A2
公开(公告)日:2011-12-08
This invention relates to B-ring aminoalkyl substituted chalcones and analogues thereof. It also relates to processes for the synthesis of such compounds and to the use of such compounds as medicaments, in particular but not exclusively for the treatment of cancer and malaria.