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由邻硝基氯代嘧啶(3)为原料,与多硫化钠和二硫化碳共煮,经一步反应获得了2-巯基噻唑[5,4-d]并嘧啶(4).由4出发,合成了一系列2位取......
The title compound 2-(2-chloro-4-nitrophenyl)-4-(4-chlorophenyl)-3a,4- diethoxy- 2,3,3a=4-tetrahydrochromeno[3,4-d][1,2,......
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Novel heteropolycyclic nitrogen systems bearing fluorine substituted pyrazolo[3,4-d] pyrimidine moiety have been synthes......