The Synthesis of α-Azidoesters and Geminal Triazides
作者:Philipp Klahn、Hellmuth Erhardt、Andreas Kotthaus、Stefan F. Kirsch
DOI:10.1002/anie.201402433
日期:2014.7.21
representatives of this novel class of triazide compounds: Despite their high nitrogen content, the geminaltriazides are easy to handle, even when preparative‐scale syntheses are performed. (Caution: These procedures still require protective measures!) The triazides are now broadly available for further studies regarding their properties and reactivity. Furthermore, we show how the method can be used to
α-Azido Esters in Depsipeptide Synthesis: C–O Bond Cleavage during Azido Group Reduction
作者:Chuda Raj Lohani、Jacob Soley、Braden Kralt、Michael Palmer、Scott D. Taylor
DOI:10.1021/acs.joc.6b02309
日期:2016.12.2
these cases, C–O bondcleavage occurred via either triazole formation and/or hydrolysis of the ester bond in the iminophosphorane intermediate to give betaines. The mechanism that dominated for C–O bondcleavage depended upon the phosphine that was used for azido group reduction. C–O bondcleavage during reduction of the azido group in the peptide was minimized by performing the reduction with PBu3 in
Photoinduced Copper-Catalyzed Late-Stage Azidoarylation of Alkenes via Arylthianthrenium Salts
作者:Yuan Cai、Sagnik Chatterjee、Tobias Ritter
DOI:10.1021/jacs.3c04016
日期:2023.6.28
nervous system. Herein, we present a photoinduced copper-catalyzed azidoarylation of alkenes at a late stage with arylthianthrenium salts, allowing access to highly functionalized acyclic (hetero)arylethylamine scaffolds that are otherwise difficult to access. A mechanistic study is consistent with a rac-BINAP-CuI-azide (2) as the photoactive catalytic species. We show the utility of the new method
Verfahren zur Herstellung von N-Acetyl-2,3-dehydro-aminocarbonsäureestern
申请人:Degussa Aktiengesellschaft
公开号:EP0076917A2
公开(公告)日:1983-04-20
Gegenstand der Erfindung ist ein Verfahren zur Herstellung von N-Acetyl-2,3-dehydro-aminocarbonsäure- estern durch Umsetzung entsprechender 2-Azido-carbonsäureester mit einem Gemisch aus einem Volumteil Essigsäureanhydrid und 1,5 bis 5 Volumteilen Essigsäure in Gegenwart von Rhenium-VII-sulfid und/oder -oxid und bei einer Temperatur zwischen 50 und 150°C, gegebenenfalls in gleichzeitiger Gegenwart von trockenem Chlorwasserstoff.