35401-80-0Relevant academic research and scientific papers
Hydrazidines, V. - Synthesis and Reactions of Aromatic and Aliphatic Hydrazidines and Their N1-Substituted Derivatives
Neunhoeffer, Hans,Karafiat, Ute,Koehler, Gernot,Sowa, Birgit
, p. 115 - 126 (2007/10/02)
Aromatic hydrazidines 3 have been synthetized by reaction of aromatic orthocarboxylates 4 with tert-butyl carbazate (5) and reaction of the protected hydrazidines 7 with HCl/methanol or HBr/acetic acid.Aliphatic N1-methylhydrazidines 8 have been prepared by methylation of bis (tert-butoxycarbonyl)-hydrazidines 7 and deprotection with HBr/acetic acid.Aromatic N1-methylhydrazidines 8 have been obtained by methylation of N1-methyl(thiohydrazides) 11, reaction of 12 with tert-butyl carbazate (5) and deprotection of 13 with HCl/methanol. -- Attempts to remove both protecting groups in N1-alkyl-N2,N4-bis(benzylidene)hydrazidines 16 failed. -- Some reactions of 3 and 8 are described.Key Words: Hydrazidines / 1,2,4-Triazines / 1,2,4,5-Tetrazines / 1,2,4,5-Tetrazinoisoindoles / Pyrrolo1,2,4,5-tetrazines
Thermal Rearrrangement of 1-Alkyl-3,6-diaryl-1,4-dihydro-s-tetrazines to 1-Alkylamino-3,5-diaryl-1,2,4-triazoles
Hunter, Daniel,Neilson, Douglas G.
, p. 2779 - 2783 (2007/10/02)
s-Tetrazines having aryl substituents in either the 3- or 3,6-positions react readily with alkyl or aryl Grignard reagents to give 1-alkyl(or aryl)-1,4-dihydro-s-terazines.The 1-alkyl-1,4-dihydro-s-tetrazines rearrange in methanolic hydrogen chloride to 4-alkylamino-1,2,4-triazoles, but thermolyse readily to the less well known, isomeric 1-alkylamino-1,2,4-triazoles.Possible reaction pathways involving breakdown to nitrile and reactive intermediates such as 1,3-dipolar species are discussed.
A Study of 1,4-Dihydro-1,2,4,5-tetrazines
Neugebauer, Franz Alfred,Krieger, Claus,Fischer, Hans,Siegel, Rolf
, p. 2261 - 2274 (2007/10/02)
X-ray structure analysis of the primary compound 1 and the derivatives 9 and 13 yields a 1,4-dihydro structure.Detailed studies of the electronic spectra of 1-16 show that also in solution the 1,4-dihydro form is thermodynamicly favoured.A series of new 1,4-dihydro-1,2,4,5-tetrazine radical cations was studied by e.s.r.
