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(Z)- and (E)-2-phenyl-4-benzylidene-5(4H)-oxazolones as dienophiles. Improved selectivity by the use of heterogeneous catalysts

✍ Scribed by Carlos Cativiela; José I. García; José A. Mayoral; Elisabet Pires; Robert Brown


Book ID
107857607
Publisher
Elsevier Science
Year
1995
Tongue
French
Weight
419 KB
Volume
51
Category
Article
ISSN
0040-4020

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✍ Shahnaz Rostamizadeh; Nasrin Shadjou; Ali M. Amani; Reza Aryan 📂 Article 📅 2008 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 151 KB

## Abstract magnified image 5‐Aryl‐6__H__‐1,3,4‐thiadiazin‐2‐aminium and 5‐aryl‐__N__‐phenyl‐6__H__‐1,3,4‐thiadiazin‐2‐aminium salts have efficiently been synthesized from the reaction of thiosemicarbazide and α‐haloketones in acetonitrile at room temperature using i) silica supported sodium hydro