Qc. Yang et al., 2 PAIRS OF STEREOISOMERS OF DIMETHYL TRIMETHOXYPHENYL)TETRAHYDROFURAN-3,4-DICARBOXYLATE, Acta crystallographica. Section C, Crystal structure communications, 53, 1997, pp. 1133-1136
Two racemic pairs of stereoisomers of the title compound, C17H22O8, we
re characterized by single-crystal X-ray analysis. Compound (Ia) has a
n r-1,2-cis,3-trans configuration, while (Ib) has an r-1,2-cis,3-cis c
onfiguration. The five-membered tetrahydrofuran rings of both isomers
adopt envelope conformations with the substituted beta-C atom as the f
lap.