ChemInform Abstract: Enantiodifferentiating cis‐trans Photoisomerization of 1,2‐ Diarylcyclopropanes and 2,3‐Diphenyloxirane Sensitized by Chiral Aromatic Esters.

Abstract

Enantiodifferentiating cis-trans Photoisomerization of 1,2-Diarylcyclopropanes and 2,3-Diphenyloxirane Sensitized by Chiral Aromatic Esters. -Symmetrically cis-1,2-disubstituted 3-membered ring compounds such as the 1,2-diphenylcyclopropane (I) undergo photoisomerization in the presence of a chiral sentisizer to yield the trans-isomers (+)-(II) and (-)-(II) with up to 10% optical purity. The effect strongly depends on the sentisizer and the solvent employed. -(INOUE, Y.; YAMASAKI, N.; SHIMOYAMA, H.; TAI, A.; J.