期刊
JOURNAL OF SULFUR CHEMISTRY
卷 35, 期 3, 页码 270-278出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17415993.2013.860142
关键词
dihydrothiophenes; rhodanines; ionic liquid; 2,4-thiazolidinediones
An efficient synthesis of 5-arylidene-2,4-thiazolidinediones and 5-benzylidene rhodanines by the Knoevenagel condensation of 2,4-thiazolidinedione or rhodanine with aromatic aldehydes was studied. It proceeded smoothly in the presence of tetrabutylammonium hydroxide/H O-2-EtOH to afford the corresponding products in high yields at 50 degrees C. Also, a series of dihydrothiophene derivatives were synthesized via the four-component reaction of aldehyde, malonitrile, 2,4-thiazolidinedione, and piperidine in the presence of Bu4NOH as a basic ionic liquid in aqueous medium. This new method offers several advantages, such as excellent yields, short reaction times, and simple procedure.
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