244228-83-9Relevant academic research and scientific papers
3,4-Diazanorcaradienes and 4,5-dihydropyridazines as precursors for new stable azomethine ylides
Boehm, Thomas,Elender, Kurt,Riebel, Peter,Troll, Theodor,Weber, Andreas,Sauer, Juergen
, p. 9515 - 9534 (2007/10/03)
The synthesis of a new class of stable coloured azomethine ylides 3 derived from 3,4-diazanorcaradienes is reported, which under acid catalysis are transformed to again coloured stable azomethine ylides 4 containing a five-membered 1-aza-1,3-cyclopentadiene skeleton. Azomethine ylides 3 in boiling methanol rearrange to 3,5-diazahomotropilidenes 8 in good yields.
Nonstereospecific 1,3-dipolar cycloadditions - LUMO(dipole)-HOMO(dipolarophile) controlled reactions
Weber, Andreas,Sauer, Juergen
, p. 807 - 810 (2007/10/03)
FMO-theory predicts a two-step mechanism accompanied by nonstereospecificity for 1,3-dipolar cycloadditions if one HOMO-LUMO interaction dominates the other one. R. Huisgen proved this phenomenon for the combination of electron-rich thiocarbonyl ylides wi
