84557-87-9Relevant articles and documents
Intramolecular polar [4·+2] cycloadditions of aryl-1-aza-2-azoniaallene salts: Unprecedented reactivity leading to polycyclic protonated azomethine imines
Bercovici, Daniel A.,Ogilvie, Jodi M.,Tsvetkov, Nikolay,Brewer, Matthias
, p. 13338 - 13341 (2013)
Charged up: In the first example of the title salts undergoing a [4 ·+2]cycloaddition reaction, the azo bond and one aromatic πbond make up the 4πcomponent. This reaction appears to be concerted and provides high yields of protonated azomethine imine products. Substituted alkenes provided products containing all-carbon or nitrogen-bearing quaternary centers in high yield.