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Mesoionic 1,2,4-triazolo[5′,1′∶3,4]-1,2,4-triazolo[1,5-a]-pyrimidines

✍ Scribed by V. A. Chuiguk; I. A. Rudnik


Book ID
112375685
Publisher
Springer US
Year
1982
Tongue
English
Weight
82 KB
Volume
18
Category
Article
ISSN
0009-3122

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## Abstract Some new 1,2,3‐triazolo[4,5‐__e__]‐1,2,4‐triazolo[3,4‐__c__]pyrimidmes were prepared starting from the corresponding 1,2,3‐triazolo[4,5‐__d__]pyrimidines __via__ the formation of the 1,2,4‐triazole ring. Thus suitable hydrazino derivatives 6 were condensed with triethyl orthoformate, tr

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## Abstract The 7‐chloro‐3‐(2‐chlorobenzyl)‐ and 7‐chloro‐3‐(2‐fluorobenzyl)‐1,2,3‐triazolo[4,5‐__d__]pyrimidines (**1** and **4**), by nucleophilic replacement with some hydrazides, gave the corresponding 7‐hydrazidoderivatives (**2a‐e** and **5a‐e**). These, by heating in Dowtherm, underwent an i