A Chiral Tetrahydro-Gamma-Pyrannonecarboxylate Ester for Asymmetric Nazarov Cyclization

Bond, C.S. and Leonard, G.A. and Regan, A.C. and Hunter, W.N. and Andrews, J.F.P. (1994) A Chiral Tetrahydro-Gamma-Pyrannonecarboxylate Ester for Asymmetric Nazarov Cyclization. Acta Crystallographica Section C-Crystal Structure Communications, 50 . pp. 133-136. ISSN 0108-2701. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

(1S,2-exo)-1-[(N,N-Dicyclohexylamino)sulfonylme-thyl]-7,7-dimethylbicycl o[2.2.1]heptan-2-yl [2R(2alpha,-3beta,5beta,6alpha)]-tetrahydro-2,5,6-trimethyl-4-oxo-2H-py- ran-3-carboxylate, C31H51NO6S, has an asymmetric unit containing two unique but similarly conformed molecules (A and B). In molecule A the cyclohexyl rings are free to crystallize in either of the approximately coplanar conformations. whereas in molecule B only one conformation is allowed. The N atoms in each molecule have approximately planar geometries, as expected from previous related structures. The tetrahydropyranone ring adopts the chair conformation with all substituents equatorial.

Item Type: Article
Subjects: A General Works
Divisions: Central Services
Depositing User: P. Ogbuji
Date Deposited: 26 Aug 2009 21:01
Last Modified: 27 Jun 2012 09:22
Resource URI: https://kar.kent.ac.uk/id/eprint/20391 (The current URI for this page, for reference purposes)
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