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Synthesis and comparative study of the heterocyclic rings on liquid crystalline properties of 2,5-aryl-1,3,4-oxa(thia)diazole derivatives containing furan and thiophene units

✍ Scribed by Han, Jie; Zhang, Feng-Yan; Wang, Juan-Yu; Wang, Yan-Mei; Pang, Mei-Li; Meng, Ji-Ben


Book ID
120397997
Publisher
Taylor and Francis Group
Year
2009
Tongue
English
Weight
495 KB
Volume
36
Category
Article
ISSN
0267-8292

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## Abstract A facile synthesis of the imidazo[1,5‐__d__]thieno[2,3‐__b__][1,4]thiazine ring system is described. Reaction of 6‐benzyl‐2,3‐dihydro‐1__H__‐thieno[2,3‐__b__][1,4]thiazine‐2‐one (**1**) with potassium __tert__‐butoxide and diethylchlorophosphate gave intermediate **2** which resulted in