1314243-43-0Relevant articles and documents
[3 + 2]-Cycloadditions of nitrile ylides after photoactivion of vinyl azides under flow conditions
Cludius-Brandt, Stephan,Kupracz, Lukas,Kirschning, Andreas
supporting information, p. 1745 - 1750 (2013/10/22)
The photodenitrogenation of vinyl azides to 2H-azirines by using a photoflow reactor is reported and compared with thermal formation of 2H-azirines. Photochemically, the ring of the 2H-azirines was opened to yield the nitrile ylides, which underwent a [3 + 2]-cycloaddition with 1,3-dipolarophiles. When diisopropyl azodicarboxylate serves as the dipolarophile, 1,3,4-triazoles become directly accessible starting from the corresponding vinyl azide.
Multistep flow synthesis of vinyl azides and their use in the copper-catalyzed huisgen-type cycloaddition under inductive-heating conditions
Kupracz, Lukas,Hartwig, Jan,Wegner, Jens,Ceylan, Sascha,Kirschning, Andreas
supporting information; experimental part, p. 1441 - 1448 (2011/12/14)
The multistep flow synthesis of vinyl azides and their application in the synthesis of vinyltriazoles is reported. The synthesis relies on a stable polymer-bound equivalent of iodine azide that serves to carry out 1,2-functionalization of alkenes in a telescope flow protocol. The intermediate 2-iodo azides are subjected to a DBU-mediated polymer-supported elimination step yielding vinyl azides in good yield. The third step involves the formation of vinyl triazoles by a copper-catalyzed Huisgen-"click" cycloaddition. The required heat is generated by electromagnetic induction based on copper. Copper serves both as heatable as well as catalytically active packed-bed material inside the flow reactor.
Synthesis of isoquinolines from α-aryl vinyl azides and internal alkynes by Rh-Cu bimetallic cooperation
Wang, Yi-Feng,Toh, Kah Kah,Lee, Jian-Yuan,Chiba, Shunsuke
supporting information; experimental part, p. 5927 - 5931 (2011/08/02)
Catalysts in a relay: A synthetic method for delivering highly substituted isoquinolines has been developed (see scheme; Cp =C5Me5, DMF=N,N-dimethylformamide, TEMPO=2,2,6,6-tetramethylpiperidine-1-oxyl). A preliminary mechanistic study showed that the rhodium and copper cooperate synergistically in the multistep sequence.