Acta Phys. -Chim. Sin. ›› 1998, Vol. 14 ›› Issue (11): 1048-1052.doi: 10.3866/PKU.WHXB19981117

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The Mechanism and Kinetics of Intramolecular Condensation Reaction of 1,3-Diaryl-3-(2-amino-phenylsulfenyl)-propan-1-one

Li Yuan, Huang Bao-Hua, Lv Ying-Chao, Jin Sheng, Xing Qi-Yi   

  1. Chemistry Department,Hebei Normal University,Shijiazhuang 050016|Institute of Chemistry and Molecular Engineering,Peking University,Beijing 100871
  • Received:1997-12-01 Revised:1998-04-01 Published:1998-11-15
  • Contact: Li Yuan


The kinetics and mechanism of intramolecular condensation of amino ketones catalyzed respectively by six acids in methanol solution were studied by means of UV spectroscopy and 1H NMR.
The results indicate that the reaction proceeds with a general acid catalytic mechanism in the presence of acetic arid, and in lactic arid, in other stronger acids-methanol solution, the mechanism is of a special arid catalytic one. The result also shows that R2 has an effect on the reaction rate.

Key words: 1,5-benzothiazepine, Condensation reaction, Kinetics, Mechanism