The asymmetri cis→trans photoisomerization of cyclo-octene (1) in the presence of the chiral aromatic esters, (–)-menthyl benzoate (2), cholesteryl benzoate (3), or di-(–)-menthyl isophthalate (4) gave (R)-(–)-trans-cyclo-octene with a maximum enantiomeric excess of 4·0%.
Y. Inoue, Y. Kunitomi, S. Takamuku and H. Sakurai, J. Chem. Soc., Chem. Commun., 1978, 1024 DOI: 10.1039/C39780001024
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