Title of article
Investigation into the regioisomeric composition of some fused tetrazoles
Author/Authors
Baravaye, Omid Departmentof Chemistry - School of Sciences - Islamic Azad University Ahvaz Branch, Ahvaz, Iran , Hafezi Birgani, Sanaz Departmentof Chemistry - School of Sciences - Islamic Azad University Ahvaz Branch, Ahvaz, Iran , Nasehi, Paria Departmentof Chemistry - School of Sciences - Islamic Azad University Ahvaz Branch, Ahvaz, Iran
Pages
10
From page
31
To page
40
Abstract
Treatment of 7-chloro-1-phenylpyrimido[4,5-e][1,3,4]thiadiazines with hydrazine in boiling ethanol gave corresponding7-hydrazinyl derivatives. Diazotization of the latter compounds acheived a mixture of 5H-tetrazolo[1',5':1,2]pyrimido[4,5-e][1,3,4]thiadiazine and 9H-tetrazolo[5',1':2,3]pyrimido[4,5-e][1,3,4]thiadiazines. Ratio of these two group of products determined by 1HNMR studies and no significant preference was observed for their formation. Efforts for separation of the products were unsuccessful and its reason is discussed.
Keywords
tetrazole-azide tautomerism , diazotization , 1HNMR study , 9H-tetrazolo[5',1':2,3]pyrimido[4,5-e][1,3,4]thiadiazine , 5H-tetrazolo[1',5':1,2]pyrimido[4,5-e][1,3,4]thiadiazine , 7-hydrazinyl-1-phenylpyrimido[4,5-e][1,3,4]thiadiazin , 7-chloro-1-phenylpyrimido[4,5e][1,3,4]thiadiazines
Journal title
Astroparticle Physics
Serial Year
2017
Record number
2429017
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