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Phosphorus, Sulfur, and Silicon and the Related Elements Volume 132, 1998 - Issue 1
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Original Articles

STUDIES ON REACTIONS OF LAWESSON′S REAGENT WITH PHENYLTHIOUREA AND OXAMIDE

Liang-Nian He Institute of Organic Synthesis, Central China Normal University, Wuhan, 430079, PR. China
,
Tian-Bao Huang Institute of Organic Synthesis, Central China Normal University, Wuhan, 430079, PR. China
,
Fei Cai Institute of Organic Synthesis, Central China Normal University, Wuhan, 430079, PR. China
&
Ru-W Chen Institute of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P.R. China
Pages 147-153 | Received 14 May 1997, Accepted 02 Jul 1997, Published online: 24 Sep 2006
 
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Abstract

Lawesson's reagent reacted with phenylthiourea in toluene at 110°C to give a product of ring-opening (2) instead of a 4-membered ring 2a. Its structure was determined by X-ray diffraction analysis. A mechanism is proposed to explain the formation of compound 2. The O-S exchange reaction of Lawesson's reagent with oxamide in acetonitrile was also investigated.

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