CONFORMATIONAL COMPOSITION OF STEREOISOMERS OF 2-ALKYL-5-ISOPROPYL-4-METHYL-1,3,2-DIOXABORINANES

Abstract

¹H and ¹³C NMR spectroscopy was used to assign the configuration of a mixture of stereoisomers of 2-alkyl-5-isopropyl-4-methyl-1,3,2-dioxaborinanes with different ratios of the cis and trans forms. These forms differ in the configuration of C₍₄₎ in the ring. The results of MM+ and AM1 calculations for the optimal geometry indicate high conformational flexibility of both isomers, which exist in an equilibrium mixture of sofa and half-chair conformers.

How to Cite
Kuznetsov, V. V. Chem. Heterocycl. Compd. 2002, 38, 1283. [Khim. Geterotsikl. Soedin. 2002, 1453.]

For this article in the English edition, see DOI https://doi.org/10.1023/A:1021750017723