New chiral ligands: 1,4-diols prepared from (S)-1-phenylethanol
作者:I. N. Shishkina、E. Yu. Sokolovskaya、K. A. Potekhin、Yu. V. Nelyubina、R. K. Askerov、V. M. Dem’yanovich
DOI:10.1134/s1070428010090125
日期:2010.9
The stereochemistry of condensation of dilithiated 1-phenylethanol with various carbonyl compounds was investigated. In most cases the reaction proceeds nonstreoselectively, and only in the condensation with PhCOBu-t and 2,4-(MeO)(2)C(6)H(3)COPh only one of the diastereomeric diols prevailed. It was shown by XRD analysis that in the prevailing diastereomeric diol the newly formed chiral carbinol center possessed the same configuration as the initial alcohol. The synthesized diols form homochiral dimers in the crystal lattice.
Stereoselective synthesis of 1,3-disubstituted phthalans by cyclization of (1S)-1-{2-[hydroxy(diaryl)methyl]phenyl}ethanols
作者:I. N. Shishkina、E. Yu. Sokolovskaya、V. M. Demyanovich
DOI:10.1007/s11172-016-1573-y
日期:2016.9
Cyclization of pure enantiomers of 1-2-[hydroxy(diaryl)methyl]phenyl}ethanol proceeds stereoselectively and affords 1,3-disubstituted 1,3-dihydroisobenzofurans (phthalans) in moderate-to-high enantiomeric (81.7% ee) or diastereomeric (72% de) purity.