4-Pyridylnitrene and 2-pyrazinylcarbene
2013 ◽
Vol 9
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pp. 754-760
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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.
2021 ◽
2002 ◽
Vol 74
(1)
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pp. 57-62
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Keyword(s):
2002 ◽
Vol 203
(2)
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pp. 405-412
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