Synthesis 2017; 49(24): 5371-5379
DOI: 10.1055/s-0036-1591310
paper
© Georg Thieme Verlag Stuttgart · New York

New Efficient Synthesis of 2-Thioxo-2,3-dihydropyrimidin-4(1H)-ones from Baylis–Hillman Adducts

Xiuhua Chen
College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu 610041, P. R. of China   Email: zhongychem@swun.cn   Email: 21900003@swun.cn
,
Ying Zhong*
College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu 610041, P. R. of China   Email: zhongychem@swun.cn   Email: 21900003@swun.cn
,
Zhigang Zhao*
College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu 610041, P. R. of China   Email: zhongychem@swun.cn   Email: 21900003@swun.cn
,
Gang Huang
College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu 610041, P. R. of China   Email: zhongychem@swun.cn   Email: 21900003@swun.cn
› Author Affiliations
This work was financially supported by the Fundamental Research Funds of Central Universities, Southwest University for Nationalities (No. 13NZYBS05), and the Research projects Sichuan Provincial Department of Education (No. 16ZB0028).
Further Information

Publication History

Received: 19 July 2017

Accepted after revision: 31 August 2017

Publication Date:
12 October 2017 (online)


Abstract

Azides obtained from Baylis–Hillman adducts were treated with triphenylphosphine to give the corresponding iminophosphoranes, which reacted with carbon disulfide at 40 °C to produce isothiocyanates. The reaction of these isothiocyanates with primary amines provided thiourea intermediates, which in the presence of potassium carbonate or sodium methoxide were converted into 2-thioxo-2,3-dihydropyrimidin-4(1H)-ones in good yields.

Supporting Information

 
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