Grigg, R., Kilner, C., Sarker, M.A.B. et al. (2 more authors) (2008) X=Y–ZH compounds as potential 1,3-dipoles. Part 64: Synthesis of highly substituted conformationally restricted and spiro nitropyrrolidines via Ag(I) catalysed azomethine ylide cycloadditions. Tetrahedron, 64 (37). pp. 8974-8991. ISSN 0040-4020
1,3-Dipolar reactions of imines of both acyclic and cyclic α-amino esters with a range of nitroolefins using a combination of AgOAc or Ag2O with NEt3 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.
|Copyright, Publisher and Additional Information:||© 2008 Elsevier B.V This is an author produced version of a paper published in Tetrahedron. Uploaded in accordance with the publisher's self archiving policy.|
|Institution:||The University of Leeds|
|Academic Units:||The University of Leeds > Faculty of Maths and Physical Sciences (Leeds) > School of Chemistry (Leeds)|
|Depositing User:||Sherpa Assistant|
|Date Deposited:||10 Oct 2008 15:25|
|Last Modified:||08 Feb 2013 16:56|