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A novel and efficient strategy to build α-benzylic quaternary cyclopentanones with excellent enantioselectivities (up to 96 % ee) and high yields (up to 99 % yield) has been developed, and its application demonstrated by the first catalytic asymmetric total synthesis of (-)-1,14-herbertenediol and the formal synthesis of (-)-aphanorphine.
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Zhu et al. (2015) studied this question.
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