期刊
TETRAHEDRON
卷 64, 期 37, 页码 8974-8991出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2008.05.132
关键词
metallo-azomethine ylides; cycloaddition; silver oxide; nitroolefins; pyrrolidines; spirocycles
资金
- Leeds University
13-Dipolar reactions of imines of both acyclic and cyclic alpha-amino esters with a range of nitroolefins using a combination of AgOAc or Ag(2)O with NEt(3) are described. In most cases the reactions were highly regio and stereospecific and endo-cycloadducts were obtained in good yield. However, in a few cases the initially formed cycloadducts underwent base catalysed epimerisation. The stereochemistry of the cycloadducts was assigned from NOE data and established unequivocally in several cases by X-ray crystallography. (C) 2008 Elsevier Ltd. All Fights reserved.
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