ChemInform Abstract: Syntheses and Properties of Selenium‐Bridged Bischromones.

Abstract

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Silver-catalysed three-component reactions of alkynyl aryl ketones, element selenium, and boronic acids leading to 3-organoselenylchromones

“…21 Another representative and conventional synthetic method for the synthesis of 3-selenyl chromones is based on the featured chromone annulation of 2-hydroxyphenyl enaminones (Scheme 1b), using R 2 Se 2 , electrophilic organoselenium reagents, KSeCN, PhSeH, and TsSeR as the selenium source. 22 However, the above two strategies can only construct chromone compounds whose 2-position is H, which greatly limits the application of the methods. The pioneering work for the construction of 2-organyl-3-organoselenylchromone through the FeCl 3 -catalysed or PIFA-promoted electrophilic cyclization reactions of 1-(2-methoxyphenyl)-3-arylprop-2-yn-1-ones and diorganyl diselenides was carried out by Zeni 23 and Yunfei Du, 24 respectively (Scheme 1c), but the former required the use of stoichiometric FeCl 3 , and both of them required the use of diorganyl diselenides as the electrophilic selenium source.…”