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• W2266647519 endingPage "1120" @default.
• W2266647519 startingPage "1113" @default.
• W2266647519 abstract "A synthesis of novel bis(triazolothiadiazines) 11 , 12 , 13 , 14 , bis(quinoxalines) 16 and 17 , bis(thiadiazoles) 24 and 25 , and bis(oxadiazole) 31 , which are linked to the thieno[2,3‐ b ]thiophene core via phenoxymethyl group, was reported. Thus, reaction of the bis( α ‐bromoketones) 6 and 7 with the corresponding 4‐amino‐3‐mercapto‐1,2,4‐triazole derivatives 8 , 9 , 10 in ethanol–DMF mixture in the presence of a few drops of triethylamine as a catalyst under reflux afforded the novel bis(5,6‐dihydro‐ s ‐triazolo[3,4‐ b ]thiadiazines) 11 , 12 , 13 , 14 in 60–72% yields. The bis(quinoxalines) 16 and 17 were also synthesized as a sole product in high yields by the reaction of 6 and 7 with o ‐phenylenediamine 15 in refluxing acetonitrile in the presence of piperidine as a catalyst. Cyclization of the bis(aldehyde thiosemicarbazones) 20 and 21 with acetic anhydride afforded the corresponding bis(4,5‐dihydro‐1,3,4‐thiadiazolyl) derivatives 24 and 25 in good yield. Bis(5‐phenyl‐2,3‐dihydro‐1,3,4‐oxadiazole) derivative 31 could be obtained in 67% yield by cyclization of the appropriate bis( N ‐phenylhydrazone) 29 in refluxing acetic anhydride for 3 h." @default.
• W2266647519 created "2016-06-24" @default.
• W2266647519 creator A5004388606 @default.
• W2266647519 creator A5072714870 @default.
• W2266647519 creator A5081339456 @default.
• W2266647519 creator A5086465141 @default.
• W2266647519 date "2015-06-25" @default.
• W2266647519 modified "2023-10-06" @default.
• W2266647519 title "3,4-Bis(bromomethyl)thieno[2,3-<i>b</i>]thiophene: Versatile Precursors for Novel Bis(triazolothiadiazines), Bis(quinoxalines), Bis(dihydrooxadiazoles), and Bis(dihydrothiadiazoles)" @default.
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• W2266647519 doi "https://doi.org/10.1002/jhet.2373" @default.
• W2266647519 hasPublicationYear "2015" @default.

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