Regioselectivity of cyclization of 1-(6-methyl-5-oxo-2,5-dihydro-1,2,4-triazin-3-yl)-4-arylthiosemicarbazides by treating with methyl iodide and dicyclohexylcarbodiimide View Full Text


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Article Info

DATE

2010-11

AUTHORS

R. I. Vas’kevich, P. V. Savitskii, E. B. Rusanov, V. I. Staninets

ABSTRACT

1-(6-Methyl-5-oxo-2,5-dihydro-1,2,4-triazin-3-yl)-4-arylthiosemicarbazides treated with methyl iodide in the presence of sodium acetate in ethanol convert into 6-methyl-3-arylamino[1,2,4]-triazolo[4,3-b][1,2,4]triazin-7(1H)-ones. In reaction with dicyclohexylcarbodiimide 6-methyl-3-arylamino[1,2,4]triazolo[3,4-c][1,2,4]triazin-5(1H)-ones were obtained which at heating in alcohol solution in the presence of sodium acetate or at 262–272°C underwent the Dimroth rearrangement to give 3-methyl-7-arylamino[1,2,4]triazolo[5,1-c][1,2,4]-triazin-4(8H)-ones.

PAGES

1682-1686

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1070428010110138

DOI

http://dx.doi.org/10.1134/s1070428010110138

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1044145850


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