51392-75-7Relevant academic research and scientific papers
4-Pyridylnitrene and 2-pyrazinylcarbene
Wentrup, Curt,Reisinger, Ales,Kvaskoff, David
, p. 754 - 760 (2013/06/27)
Both flash vacuum thermolysis (FVT) and matrix photolysis generate 2-diazomethylpyrazine (22) from 1,2,3-triazolo[1,5- a]pyrazine (24). FVT of 4-azidopyridine (18) as well as of 24 or 2-(5-tetrazolyl)pyrazine (23) affords the products expected from the nitrene, i.e., 4,4'-azopyridine and 2- and 3-cyanopyrroles. Matrix photolyses of both 18 and 24 result in ring expansion of 4-pyridylnitrene/2-pyrazinylcarbene to 1,5-diazacyclohepta-1,2,4,6-tetraene (20). Further photolysis causes ring opening to the ketenimine 27.
1,2,3-TRIAZOLOAZINES ET AUTRES HETEROCYCLES AZOTES DERIVES D'AZINE-CARBOXALDEHYDES
Maury, Georges,Meziane, Driss,Srairi, Driss,Paugan, Jean-Paul,Paugam, Renee
, p. 153 - 162 (2007/10/02)
α-(N)-azine-carboxaldehydes are convenient precursors of 1,2,3-triazoloazines.Through oxidative cyclisation of the corresponding hydrazones we have prepared the new 1,2,3-triazolopyridazine and 1,2,3-triazolopyrazine.Unlike the other azaindolizines these compounds are degraded by electrophiles. attempts to prepare imidazopyrimidine or derivatives have been carried out either from 4-aminomethylpyrimidine or from ethyl 2-(4-pyrimidinyl)propionate.
