Synthesis and Antiallergy Activity of (1,3,4)Thiadiazolo(3,2-a)-1,2,3-triazolo(4,5-d)pyrimidin-9(3H)-one Derivatives. I.
作者:Norio SUZUKI、Tamotsu MIWA、Shunzo AIBARA、Hideyuki KANNO、Hideo TAKAMORI、Masao TSUBOKAWA、Yuichi RYOKAWA、Wataru TSUKADA、Sumiro ISODA
DOI:10.1248/cpb.40.357
日期:——
6-substituted [1,3,4]thiadiazolo[3,2-a]-1,2,3-triazolo[4,5-d]pyrimidin-9(3H)-one derivatives 4a--z were synthesized from 5-substituted 1,3,4-thiadiazol-2-amines 5 by the following consecutive reactions: pyrimidine ring closure with bis(2,4,6-trichlorophenyl) malonate, nitration, chlorination, amination, hydrogenation and diazotization. The structure of 4 was confirmed by an alternate synthesis of 4, involving
一系列6取代的[1,3,4]噻二唑[3,2-a] -1,2,3-三唑并[4,5-d]嘧啶-9(3H)-一衍生物4a-z为通过下列连续反应由5-取代的1,3,4-噻二唑-2-胺5合成:用双(2,4,6-三氯苯基)丙二酸酯进行嘧啶闭环,硝化,氯化,胺化,氢化和重氮化。通过交替合成4来证实4的结构,该合成涉及5-取代的2-叠氮基-1,3,4-噻二唑13与氰基乙酸乙酯的反应,然后进行Dimroth重排和闭环。评估了产品的抗过敏活性(抗-被动性腹膜过敏,抗-被动性皮肤过敏和抗慢反应物质)。