Preparation and structural analysis of several new α, α, α′, α′??tetraaryl??1, 3??dioxolane??4, 5??dimethanols (TADDOL's) and TADDOL analogs, their evaluation as …

…, X Ariza, AK Beck, A Boháč, C Ganter…

Index: Ito, Yoshio N.; Ariza, Xavier; Beck, Albert K.; Bohac, Andrej; Ganter, Camille; et al. Helvetica Chimica Acta, 1994 , vol. 77, # 8 p. 2071 - 2110

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Citation Number: 123

Abstract

Abstract Preparation and screening of twenty new ligands, all analogs of α, α, α′, α′- tetraaryl-1, 3-dioxolane-4, 5-dimethanol (TADDOL), for the Ti-catalyzed asymmetric addition of methyltri (isopropoxy) titanium and diethylzinc to benzaldehyde are described. These ligands have the dioxolane ring of the TADDOL's replaced by cyclobutane, cyclopentane, cyclohexene, cyclohexane, bicyclo [2.2. 1] heptene and-heptane and bicyclo [2.2. 2] ...