Thiourea-catalyzed asymmetric formal [3+2] cycloaddition of azomethine ylides with nitroolefins

Tetrahedron Letters

Volumn 49, Issue 48, 2008, Pages 6910-6913

  Xie, Jianwu ^a   Yoshida, Kohzo ^a   Takasu, Kiyosei ^a   Takemoto, Yoshiji ^a  

^a KYOTO UNIVERSITY   (Japan)

Author keywords

3+2 Cycloaddition; Asymmetric catalyst; Organocatalyst; Pyrrolidines

Indexed keywords

ALKENE DERIVATIVE; AMINE; AZOMETHINE YLIDE; PYRROLIDINE DERIVATIVE; THIOUREA; TRIFLUOROETHANOL;

ARTICLE; CATALYSIS; CATALYST; CYCLOADDITION; ENANTIOSELECTIVITY; MICHAEL ADDITION;

EID: 56949108837     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2008.09.113     Document Type: Article

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32. w = 0.057, GOF = 0.66, Flack parameter = 0.00(3). The absolute structure was determined to be (R)-configuration with a high degree of certainty from the Flack parameter χ = 0.00(3). Flack, H. D. Acta Crystallogr. 1983, A39, 876-881. CCDC 696671 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif.
33. w = 0.051, GOF = 0.78. CCDC 696672 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif.
34. 3).
35. w = 0.045, GOF = 1.74. CCDC 696673 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif.