Solvent-Free Synthesis of 2-Amino-5-Aryloxymenthyl1-1, 3, 4-Thiadiazoles and Their Coumarin or Benzofuran Bis-Heterocyclic Dericatives
…, JL Yu, JY Yang, W Zhu, YL Zhao, YL Xing…
Index: Li, Zheng; Yu, Jin-Lan; Yang, Jing-Ya; Zhu, Wei; Zhao, Yan-Long; Xing, Yu-Lin; Wang, Xi-Cun Phosphorus, Sulfur and Silicon and the Related Elements, 2006 , vol. 181, # 1 p. 183 - 190
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Abstract
2-amino-5-aryloxymethyl-1, 3, 4-thiadiazoles were synthesized rapidly by a microwave- accelerated solvent-free procedure in high yield via the condensation of thiosemicarbazide with aryloxyacetic acids using poly (ethylene glycol) supported dichlorophosphate as a dehydration reagent. The solvent-free N-acylation of 2-amino-5-aryloxymethyl-1, 3, 4- thiadiazoles with coumarin-3-carboxylic acid chloride or benzofuran-2-carboxylic acid ...
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