C2 symmetry and asymmetric induction - American Chemical Society

presence of a C2 symmetry axis within the chiral aux- iliary can serve the very important function of dra- matically reducing the number of possible c...
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Chem. Rev. 1989. 89, 1581-1590

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C , Symmetry and Asymmetric Induction JAMES K. WHITESELL oepartment of Chemistry, Univers/iy of Texas, Austin, Texas 78712 Received January 12, 1989 (Revised Manuscript Received February 21. 1969)

Contents

Introduction C, Chiral Auxiliaries for Asymmetric Induction A. Monodentate Auxiliaries i. Amines ii. Boranes E. Bidenlate Auxiliaries i. Phosphorus-Eased Auxiliaries ii. Oxygen-Based Auxiliaries iii. Nitrogen-Eased Auxiliaries C. Polydentate Ligands 111. Interesting C, Molecules 1. 11.

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I . Introduction

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