N-Phenylselenosaccharin (NPSSac): a new electrophilic selenium-containing reagent
摘要:
A new reagent N-phenylselenosaccharin (NPSSac) was simply prepared and used as a source of the electrophilic phenylselenyl group. This relatively stable new compound was able to react with a series of electron rich organic molecules like alkenes in the presence of external or internal nucleophiles, activated aromatic substrates, or enolizable carbonyl derivatives, under very mild experimental conditions. (c) 2006 Elsevier Ltd. All rights reserved.
N‐fluorobenzenesulfonimide as both the oxidant and the amination reagent, we have realized the first example of the intermolecular chalcogenative amination of alkynes, which grants facile, highly regio‐ and stereoselective access to chalcogenated enamides. The reaction features mild conditions, high yields and selectivities, remarkably broad substrate scope, and excellent functional group tolerance. Mechanistic
An efficiently divergent intramolecular Friedel–Craftsalkylation by unactivated alkenes with seleniranium ion-controlled Markovnikov/anti-Markovnikov specificities under mild conditions has been investigated. 2-Benzoxepin, isochroman, and isochromene can be produced in one-pot procedures from the same substrate in high yields and with high regio- and stereospecificity. The products are challenging
N-Phenylselenosaccharin (NPSSac): a new electrophilic selenium-containing reagent
作者:Marco Tingoli、Rosita Diana、Barbara Panunzi
DOI:10.1016/j.tetlet.2006.08.068
日期:2006.10
A new reagent N-phenylselenosaccharin (NPSSac) was simply prepared and used as a source of the electrophilic phenylselenyl group. This relatively stable new compound was able to react with a series of electron rich organic molecules like alkenes in the presence of external or internal nucleophiles, activated aromatic substrates, or enolizable carbonyl derivatives, under very mild experimental conditions. (c) 2006 Elsevier Ltd. All rights reserved.