Journal of the Chemical Society. Chemical communications p. 779 - 781 (1984)
Update date:2022-08-03
Topics:
Kawakami, Yukio
Hiratake, Jun
Yamamoto, Yukio
Oda, Jun'ichi
Axially dissymmetric binaphthyldiamine derivatives formed by asymmetric ring opening of the cyclic anhydrides (3) and (4) ring close on hydrolysis to give (-)-cis-2,4-dimethylvalerolactone (6) and (-)-mevalonolactone (7) in 92percent and 58percent enantiomeric excess (e.e.), respectively; similarly the derivative of the racemic cyclic anhydride (+/-)-(3) ring closes to give (-)-trans-2,4-dimethylvalerolactone with 74percent e.e.
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