Potassium carbonate in poly (ethylene glycol-400) has been found to be a highly effective and efficient medium for the straight forward, convenient, one pot and green synthesis of diethyl/ethyl cyano-5-[substituted phenyl-2,3-dihydro-[1,3,4]-thiadiazolidino - [2, 3-c] – [1, 2, 4]-triazol -2- yl] – malonate/acetate through intramolecular cyclo- elimination of Michael adducts formed between the reaction of 4-amino-5- substituted phenyl-3-mercapto-1,2,4-triazole 1 with diethyl-2-(ethoxymethylene) malonate and ethyl -2-cyano-3-ethoxyacrylate respectively. The structures of all the new compounds have been elucidated using IR, ¹H and ¹³C NMR, mass spectral data and elemental analyses.

中文翻译：

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PEG-400中的双杂双迈克尔加成反应：2,3-二氢-[2,3-c]-[1,2,4]-三唑支架的合成

已经发现，聚（乙二醇-400）中的碳酸钾是一种高效，高效的介质，可用于直接，方便，一锅又绿色地合成二乙基/乙基氰基-5- [取代的苯基-2,3-二氢] -[1,3,4]-噻二唑烷-[2,3-c]-[1,2,4]-三唑-2-基]-丙二酸酯/乙酸酯通过分子内环消除反应之间形成的迈克尔加合物分别用2-（乙氧基亚甲基）丙二酸二乙酯和-2-氰基-3-乙氧基丙烯酸乙酯的4-氨基-5-取代苯基-3-巯基-1,2,4-三唑1。使用IR，¹ H和¹³ C NMR，质谱数据和元素分析已阐明了所有新化合物的结构。