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Enantioselective synthesesO 0031 Chiral Tetrafluorobenzobarrelenes as Highly Efficient Ligands for the Rhodium-

-Catalyzed Asymmetric 1,4-Addition of Arylboronic Acids. — New C2-symmetric chiral diene ligands bearing a tetrafluorobenzobarrelene framework and (-)-menthyl groups as chiral auxiliaries are used to give β-arylcarbonyl compounds (III) and (V) in high yields with high enantioselectivity. — (NISHIMURA*, T.; NAGAOSA, M.; HAYASHI, T.; Chem. Lett. 37 (2008) 8, 860-861; Dep. Chem., Grad. Sch. Sci., Kyoto Univ., Sakyo, Kyoto 606, Japan; Eng.) — M. Paetzel

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