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Chiral {{2,2'-[Cyclohexane-1,2-diylbis(nitrilomethylidyne)]bis[phenolato]}(2-)}cobalt ([Co(salen)])-TypeComplexes. -Several bimetallic Co(salen)-type catalysts are tested. High yields and enantioselectivities of up to 99% suggest a great potential for product generation on an industrial scale, as shown in the synthesis of the β-blockers (S)-atenolol (III) and (S)-propranolol (IV). -(KAWTHEKAR, R. B.; KIM*, G.-J.; Helv. Chim. Acta 91 (2008) 2, 317-332; Dep. Chem. Eng., Inha Univ., Incheon 402-751, S. Korea; Eng.) -Kieslich 25-111

Heterobimetallic cobalt salen complexes are used for the enantioselective ring opening of racemic terminal epoxides with H2O, phenols, or CO2. -(KAWTHEKAR, R. B.; BI, W.-T.; KIM*, G.-J.; Bull.

Enantioselective syntheses O 0031 Synthesis of Optically Active 2-Hydroxy Monoesters via-Kinetic Resolution and Asymmetric Cyclization Catalyzed by Heterometallic Chiral (Salen) Co Complex.-The utility of the dinuclear heterometallic chiral salen Co-complexes is demonstrated for the asymmetric ring opening of epoxides with carboxylic acids or the asymmetric cyclization of 1-chloro-2-hydroxypropanol derivatives via kinetic resolution. -(LI, W.; THAKUR, S. S.; CHEN, S.-W.; SHIN, C.-K.; KAWTHEKAR, R. B.; KIM*, G.-J.; Tetrahedron Lett. 47 (2006) 20, 3453-3457; Dep. Chem. Eng., Inha Univ., Inchon 402-751, S. Korea; Eng.) -Mais 35-029