New Synthesis of Aryl and Heteroaryl N-Acylureas via Microwave-Assisted Palladium-Catalysed Carbonylation
作者:David Liptrot、Lilian Alcaraz、Bryan Roberts
DOI:10.1002/adsc.201000395
日期:2010.9.10
practical synthesis of aryl and heteroaryl N‐acylureas has been developed via palladium‐catalysed carbonylation of aryl or heteroaryl halides in the presence of urea nucleophiles. A range of reactions illustrating the wide scope of this reaction was carried out under microwave irradiation, using either carbonmonoxide gas in a vessel equipped with a gas inlet adapter, or molybdenumhexacarbonyl as the
Einige N‐Acyl‐Harnstoffe ergeben in einer Spaltungsreaktion mit Aminen nicht nur die gleichen Produkte wie freie Isocyanate, sondern zeigen in Abhängigkeit von der Basizität der Nucleophile und den elektronischen Einflüssen der Substituenten eine Reihe nicht erwarteter Reaktionen.
Copper(II)-Catalyzed Reactions of α-Keto Thioesters with Azides via C–C and C–S Bond Cleavages: Synthesis of <i>N</i>-Acylureas and Amides
作者:Rajib Maity、Sandip Naskar、Indrajit Das
DOI:10.1021/acs.joc.7b03054
日期:2018.2.16
Cu(II)-catalyzed reaction of α-keto thioesters with trimethylsilyl azide (TMSN3) proceeds with the transformation of the thioester group into urea through C–C and C–S bond cleavages, constituting a practical and straightforward synthesis of N-acylureas. When diphenyl phosphoryl azide (DPPA) is used instead as the azide source in an aqueous environment, primary amides are formed via substitution of