I. Grosu et al., SYNTHESIS AND STEREOCHEMISTRY OF SOME NEW DERIVATIVES OF 1,5-DIOXASPIRO[5.5]UNDECANE, Heterocyclic communications, 3(4), 1997, pp. 345-354
The stereoisomerism of some spiro-1,3-dioxanes obtained from substitut
ed cyclohexanones and 2-methyl-2-ethyl-1,3-propanediol is discussed on
the basis of the helical chirality of the 1,5-dioxaspiro[5.5]undecane
skeleton and of the data of conformational analysis. The influence of
the flexibility of the rings on the representative number of isomers
and on their NMR spectra is commented. The isomers (diastereomers and
enantiomers) of some peculiar compounds were separated by gas chromato
graphy using chiral columns.