New ytterbium complex-catalyzed multieomponent reactions for synthesis of dihydropyrimidines: [4 + 2] cycloaddition vs. Biginelli type reaction

Chemistry Letters

Volumn 38, Issue 1, 2009, Pages 56-57

  Zhu, Jie ^a   Zhang, Mingjie ^a   Liu, Bo ^a   Li, Xiaojuan ^a  

^a TIANJIN UNIVERSITY   (China)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 67650457732     PISSN: 03667022     EISSN: 13480715     Source Type: Journal    
DOI: 10.1246/cl.2009.56     Document Type: Article

References (26)

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24. 4) and evaporated, the residue was purified by column chromatography (petroleum ether (60-90 °C) /ethyl acetate, 6:1-4:1) to afford the corresponding product.
25. Crystallographic data reported in this manuscript have been deposited with Cambridge Crystal lographic data centre as supplementary publication no. CCDC 685708 4a, 685709 7a. Copies of the data can be obtained, free of charge via www.ccdc.cam.ac.uk/conts/retrieving.html (or from the Cambridge Crystallographic data centre, 12, Union Road, Cambridge, CB2 1EZ, UK; fax: +44-1223-336033; or e-mail: deposit@ccdc.cam.ac.uk).
26. Supporting Information is available electronically on the CSJ-Joumal Web site, http://www.csj.jp/journals/chem-lett /index.html.