Dimroth rearrangement in the row of new pyrano[3,4‐ c ][1,2,4]triazolo[4,3‐ a ][1,5‐ a ]pyridines and synthesis of new heterocyclic systems:pyranopyrazolo[4,3‐ e ][1,2,4]triazolopyridines

2021 ◽  
Author(s):  
Ervand G. Paronikyan ◽  
Shushanik Sh. Dashyan ◽  
Suren S. Mamyan ◽  
Armen G. Ayvazyan
Keyword(s):  
Dimroth Rearrangement

Dimroth Rearrangement-Old but not Outdated

2017 ◽  
Vol 21 (25) ◽  
Author(s):  
Anna Krajczyk ◽  
Jerzy Boryski
Keyword(s):  
Dimroth Rearrangement

Synthesis of 4-Arylaminoquinazolines from 2-amino-N'-Arylbenzamidines and Orthoesters via the Dimroth Rearrangement of Intermediate Quinazolin-4(3H)- Imines

2019 ◽  
Vol 22 (28) ◽  
pp. 2801-2808
Author(s):  
Krzysztof Zemlak ◽  
Wojciech Szczepankiewicz ◽  
Bartłomiej Kula ◽  
Tadeusz Bieg
Keyword(s):  
Dimroth Rearrangement

Synthesis of 2-amino-5,7-dimethyl-4-oxopyrido[3,4-e]-1,3-thiazines

1983 ◽  
Vol 48 (12) ◽  
pp. 3426-3432 ◽  
Author(s):  
Dušan Koščík ◽  
Pavol Kristian ◽  
Ondrej Forgáč
Keyword(s):  
Spectral Data ◽  
Chlorine Atom ◽  
Mass Spectra ◽  
High Reactivity ◽  
Secondary Amines ◽  
Dimroth Rearrangement ◽  
H Nmr ◽  
New Synthesis ◽  
C Nmr

New synthesis of pyrido[3,4-e]-1,3-thiazines consisting in reaction of 2,6-dimethyl-4-chloronicotinoyl isothiocyanate with primary or secondary amines, or with benzaldehyde phenylhydrazone, is described. High reactivity of the chlorine atom does not allow isolation of the corresponding thioureas, arising as intermediates, except in the case of the benzylamino derivative. Structure of the products was unequivocally confirmed by their spectral data (IR, UV, 1H NMR, 13C NMR and mass spectra). The synthesized derivatives do not undergo the Dimroth rearrangement.

Synthesis and Dimroth Rearrangement of 3-Amino-4-(5-amino-1H-1,2,3-triazol-1-yl)-1,2,5-oxadiazoles.

ChemInform ◽  
2004 ◽  
Vol 35 (37) ◽  
Author(s):  
Vladimir Yu. Rozhkov ◽  
Lyudmila V. Batog ◽  
Elena K. Shevtsova ◽  
Marina I. Struchkova
Keyword(s):  
Dimroth Rearrangement

ChemInform Abstract: Pyrazolo[3,4-d][1,2,3]triazolo[1,5-a]pyrimidine: A New Ring System Through Dimroth Rearrangement.

ChemInform ◽  
2008 ◽  
Vol 39 (50) ◽  
Author(s):  
Antonino Lauria ◽  
Ilenia Abbate ◽  
Chiara Patella ◽  
Noemi Gambino ◽  
Arturo Silvestri ◽  
...  
Keyword(s):  
Ring System ◽  
Dimroth Rearrangement
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