Scheme 1.
Synthesis of (Z)-5-(substituted benzylidene)-3-phenyl-2-thioxooxazolidin-4-one derivatives 1a–1p. Reagents and conditions: (a) Et3N, CH2Cl2, rt, 42 h, 29.3%; (b) NaOAc, AcOH, reflux, 9–25 h, 18–85%.
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