New 1,2,3‐triazolo[4,5‐
<i>e</i>
]1,2,4‐triazolo[4,3‐
<i>c</i>
]pyrimidine derivatives II
作者:Giuliana Biagi、Irene Giorgi、Oreste Livi、Federica Pacchini、Valerio Scartoni
DOI:10.1002/jhet.5570390505
日期:2002.9
enzyl)-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 intramolecular cyclization to form the new tricyclic 7-substituted-3-(2-chlorobenzyl)- and 3-(2-fluorobenzyl)-1,2,3-triazolo[4,5-e]1,2,4-triazolo[4,3-c]pyrimidines (3a-d and 6a-d). The 7-hydra
通过亲核取代的7-氯-3-(2-氯苄基)-和7-氯-3-(2-氟苄基)-1,2,3-三唑[4,5- d ]嘧啶(1和4)用一些酰肼,得到相应的7-酰肼基衍生物(2a-e和5a-e)。这些通过在Dowtherm中加热而进行分子内环化以形成新的三环的7-取代的-3-(2-氯苄基)-和3-(2-氟苄基)-1,2,3-三唑[4,5- e ] 1,2,4-三唑并[4,3- c ]嘧啶(3a-d和6a-d)。7-肼基-3-(2-氯苄基)-和7-肼基-3-(2-氟苄基)-三唑并嘧啶(9a和9b)也通过相应的巯基(7a和7b)和硫代甲基(8a和8b)衍生物制备。