The synthesis and stereochemistry of some new 2,5-substituted 1,3-oxathiane derivatives are reported. The anancomeric or flexible structure of the derivatives and some peculiar cases of prochirality are revealed by NMR investigations.
The stereochemistry of new spiro-1,3-oxathiane derivatives has been explored by NMR methods and the molecular structure of one compound established via single crystal by X-ray diffractometry. The investigations revealed flexible, semi-flexible and anancomeric structures and the ring–chain tautomerism of the 1,3-oxathiane heterocycle.
The synthesis and stereochemistry of the first reported pentaspiro- and hexaspiro-1,3-dioxane and polyspiro-1,3-oxathiane (from dispiro to hexaspiro) derivatives are described. The crystal structures of a dispiro- and tetraspiro-1,3-oxathiane were determined by X-ray diffraction methods. NMR and chiral column HPLC investigations in solution revealed flexible and semiflexible structures for which syn-anti, cis-trans and d,l isomers were observed. (C) 2004 Elsevier Ltd. All rights reserved.
Castro,B.; Selve,C., Bulletin de la Societe Chimique de France, 1974, p. 3009 - 3014
作者:Castro,B.、Selve,C.
DOI:——
日期:——
TURYANSKAYA, A. M.;GREN, A. I.;BACHERIKOV, V. A., VINITI 792-85
作者:TURYANSKAYA, A. M.、GREN, A. I.、BACHERIKOV, V. A.