122127-12-2Relevant articles and documents
Studies in 1-Aza-1,3-butadienes: A Novel Synthesis of Substituted Thiadiazin-1-oxides through Diels-Alder Cycloaddition of N-Sulphinylanilines and Open-Chain Conjugated Azomethines
Singal, Kewal Krishan,Singh, Baldev,Rehalia, Kushal Singh
, p. 843 - 845 (2007/10/02)
1,4-Diaryl-1-aza-1,3-butadienes (I) behave as excellent heterodienes and undergo a facile 1,4-cycloaddition with N-sulphinylanilines as dienophiles leading to the formation of 2,3,6-triaryl-6H-2,3-dihydro-1,2,6-thiadiazin-1-oxide derivatives (II).However, presence of an o-nitro function on the C-phenyl ring renders the heterodienes less reactive.The presence of the N-phenyl moiety of I has little effect on this (4+2) cycloaddition.