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Investigation into the regioisomeric composition of some tetrazolopyrimido[4,5- E] [1,3,4] thiadiazines: 1H-NMR studies
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نویسنده
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nikpour m. ,sabaghian a.j. ,atashi s. ,chermahini a.n.
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منبع
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journal of the chemical society of pakistan - 2012 - دوره : 34 - شماره : 4 - صفحه:958 -962
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چکیده
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Treatment of 7-chloro-1-phenylpyrimido[4,5-e][1,3,4]thiadiazines with hydrazine in boiling ethanol gave corresponding 7-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 9htetrazolo[ 5',1':2,3]pyrimido[4,5- e][1,3,4]thiadiazines. ratio of these two group of products determined by 1h-nmr studies and no significant preference was observed for their formation. efforts for separation of the products were unsuccessful and its reason is discussed.
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کلیدواژه
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5H-tetrazolo[1' ,5':1 ,2]pyrimido[4 ,5-e] [1 ,4]thiadiazine; 7-chloro-1-phenylpyrimido [4 ,5-e] [1 ,4] thiadiazines; 7-hydrazinyl-1- phenylpyrimido [4 ,5-e][1 ,4]thiadiazin; 9H-tetrazolo[5' ,1':2 ,3]pyrimido[4 ,5-e][1 ,4]thiadiazine; 1H-NMR study; Diazotization; Tetrazole-azide tautomerism
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آدرس
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department of chemistry,school of sciences,islamic azad university, ایران, department of chemistry,school of sciences,islamic azad university, ایران, department of chemistry,school of sciences,islamic azad university, ایران, isfahan university of technology, ایران
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Authors
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