Ethyl 3-alkyl-4-hydroxy-2-thioxothiazolidine-4-carboxylates were prepared in excellent yields from the reaction of corresponding primary amines with carbon disulfide and ethyl 3-bromo-2-oxopropanoate in the presence of anhydrous potassium phosphate in DMF at room temperature within 1 h. The structures of the highly functionalized products were corroborated spectroscopically JR, H-1 NMR, C-13 NMR, EI-MS) and by elemental analyses. A plausible mechanism for such type of cyclization was proposed.
机构:
Chinese Acad Sci, Shanghai Inst Mat Med, Shanghai 201203, Peoples R ChinaChinese Acad Sci, Shanghai Inst Mat Med, Shanghai 201203, Peoples R China
Liu, Zheng
Li, Haihong
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Topharman Shanghai Co Ltd, Shanghai 201209, Peoples R ChinaChinese Acad Sci, Shanghai Inst Mat Med, Shanghai 201203, Peoples R China
Li, Haihong
Zhao, Qingjie
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Chinese Acad Sci, Shanghai Inst Mat Med, Shanghai 201203, Peoples R ChinaChinese Acad Sci, Shanghai Inst Mat Med, Shanghai 201203, Peoples R China
Zhao, Qingjie
Shen, Jingshan
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Chinese Acad Sci, Shanghai Inst Mat Med, Shanghai 201203, Peoples R China
Topharman Shanghai Co Ltd, Shanghai 201209, Peoples R ChinaChinese Acad Sci, Shanghai Inst Mat Med, Shanghai 201203, Peoples R China