Thesis advisor: Shih-Yuan Liu / New P-central and axially chiral 1,4-azaborine-derived biaryl phosphine Senphos ligand were designed and synthesized. The separation of diastereomers and enantiomers of those ligands was achieved through preparative recycling HPLC, and the separation efficiency was increased via the use of a borane protecting group. The effect of solvents and diamine ligands in enantioselective ligand synthesis was examined. The absolute configuration of the key enantiomer was confirmed via X-ray crystallography analysis. The catalytic performance of these newly synthesized ligands was evaluated through several benchmark reactions, demonstrating their potential in enantioselective catalysis. / Thesis (MS) — Boston College, 2024. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Chemistry.

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by Wai Ming Ho. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1995. / Includes bibliographical references (leaves 71-74). / ACKNOWLEDGEMENTS --- p.i / CONTENTS --- p.ii / ABSTRACT --- p.iv / Chapter I. --- INTRODUCTION --- p.1 / Chapter I-1. --- Liquid Crystal Mesophases --- p.1 / Chapter I-1-1. --- Mesophases --- p.1 / Chapter I-1 -2. --- Classification of liquid crystals according to molecular order --- p.1 / Chapter I-2. --- Ferroelectric Liquid Crystals --- p.6 / Chapter I-3. --- "The Relationship Among Spontaneous Polarization, Tilted Angle and Response Time" --- p.7 / Chapter I-4. --- Applications of Liquid Crystals --- p.8 / Chapter I-5. --- An Ideal Ferroelectric Liquid Crystal --- p.9 / Chapter I-6. --- Recent Development in Chiral Liquid Crystals --- p.10 / Chapter I-7. --- Aim of The Present Research: Chiral Liquid Crystals from Carbohydrates --- p.15 / Chapter II. --- RESULTS AND DISCUSSION --- p.17 / Chapter II-1. --- "Synthesis of 4',4""-Heptoxybiphenyl (methyl 2-O-n- butyl-3,4-dideoxy-a-D-glucopyranosid) uronate (12) and 4',4""-Cyanobiphenyl (methyl 2-O-n-butyl -3,4-dideoxy-a-D-glucopyranosid) uronate (13)" --- p.17 / Chapter II-2. --- "Synthesis of 4',4''-Heptoxybiphenyl (methyl 2-O-n- butyl-3,4-di-O-methyl-a-D-glucopyranosid) uronate (14) and 4' ,4""-Cyanobiphenyl (methyl 2-O-n-butyl -3,4-di-O-methyl-α-D-glucopyranosid) uronate (15)" --- p.33 / Chapter II-3. --- Mesomorphic Phases and Transition Temperatures of Chiral Liquid Crystalline Compounds 12 and 13 --- p.42 / Chapter III. --- CONCLUSION --- p.47 / Chapter IV. --- EXPERIMENTAL SECTION --- p.48 / Chapter V. --- REFERENCES --- p.71 / List of Spectra --- p.75 / Spectra --- p.76

by Qian Wang. / Thesis (Ph.D.)--Chinese University of Hong Kong, 1992. / Includes bibliographical references (leaves 107-111). / Acknowledgements --- p.i / Contents --- p.ii / Abstract --- p.iv / Chapter I. --- Introduction --- p.1 / Chapter II. --- Results and Discussion --- p.23 / Chapter II-1. --- "Stereoselective Synthesis of Chiral Liquid Crystalline Compounds Containing a 1,4-Disubstituted Cyclohexene Ring" --- p.23 / Chapter II-1-1. --- "Synthesis of (S)-(-)- and (R)-(+)-4'-(4""-Cyanobiphenyl) 4-Pentyl-3-cyclohexene-1-carboxylate (1 and 3) and (S)-(-)-4'-(4""-Octoxybiphenyl) 4-Pentyl-3-cyclohexene-1-carboxylate (2)" --- p.23 / Chapter II-1-2. --- "Synthesis of (S)-(-)-4'-(4""-Cyanobiphenyl) 4-Butoxymethyl-3-cyclohexene-1-carboxylate (4)" --- p.35 / Chapter II-1-3. --- "Synthesis of (S)-(-)- and (R)-(+)-4'-(4""-Heptoxybiphenyl) 4-(2-Propenyl)-1-cyclohexene-1-carboxylate (5 and 7) and (S)-(-)- and (R)-(+)-4'-(4""-Octoxybiphenyl) 4-(2-Propenyl)-1-cyclohexene-1-carboxylate (6 and 8)" --- p.37 / Chapter II-2. --- "Synthesis of Chiral Liquid Crystalline Compound Containing a trans-2,5-Disusbstituted Cyclohexanone Ring´ؤ(1S,4S)-4'-(4""-Heptoxybiphenyl) 4-Penyl-3-cyclohexanone-1-carboxylate (9)" --- p.42 / Chapter II-3. --- "Determination of Enantiomeric Purities of (S)-(-)- and (R)-(+)-Perillalcohols (17 and 28), (S)-(-)- and (R)-(+)-1-Pentyl-4-hydroxymethyl-l-cyclohexenes(35 and 36), and (2S,5S)-2-Pentyl-5-hydroxymethyl-l-cyclohexanone (64)" --- p.58 / Chapter II-3-1. --- Determination of Enantiomeric Purities of (S)-(-)- and (R)-(+)-Perillalcohols (17 and 28) --- p.58 / Chapter II-3-2. --- Determination of Enantiomeric Purities of (S)-(-)- and (R)-(+)-1-Pentyl-4-hydroxymethyl-1-cyclohexenes (35 and36) --- p.64 / Chapter II-3-3. --- "Determination of Enantiomeric Purity of (2S,5S)-2-Pentyl-5-hydroxymethyl-1 -cyclohexanone (64)." --- p.67 / Chapter II-4. --- "Mesomorphic Phases and Transition Temperatures of Chiral Liquid Crystalline Compounds 2, 3, 5, 6, 7, 8 and 9" --- p.72 / Chapter III. --- Conclusion --- p.77 / Chapter IV. --- Experimental --- p.78 / Chapter V. --- References --- p.107 / List of Spectra --- p.112 / Spectra --- p.116

by Wong Hei Lam Harry. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1999. / Includes bibliographical references (leaves 60-67). / Abstract also in Chinese. / Library's copy: Copy 2 imperfect, p. 60-63 missing. / Table of Contents --- p.i / Acknowledgments --- p.iii / Abbreviations --- p.iv / Abstract --- p.v / Abstract (Chinese) --- p.vi / Chapter CHAPTER I --- GENERAL INTRODUCTION / Chapter 1.1.1 --- Different biological activities of enantiomers --- p.1 / Chapter 1.1.2 --- Approach to enantiomerically pure compounds --- p.3 / Chapter 1.1.3 --- Principle of asymmetric synthesis --- p.4 / Chapter 1.1.4 --- Asymmetric catalysis and chiral catalyst --- p.5 / Chapter 1.2.1 --- Asymmetric cyclopropanation: general introduction --- p.6 / Chapter 1.2.2 --- Asymmetric cyclopropanation: initial studies --- p.8 / Chapter 1.2.3 --- Development of c2-symmetric semicorrin and its derivatives --- p.10 / Chapter 1.2.4 --- Bisoxazolines --- p.12 / Chapter 1.2.5 --- Tridentate N donor ligands --- p.13 / Chapter 1.2.6 --- "2,2'-Bipyridines" --- p.14 / Chapter 1.2.7 --- Chiral metalloporphyrin catalyst --- p.15 / Chapter 1.2.8 --- Intramolecular asymmetric cyclopropanation --- p.16 / Chapter CHAPTER II --- DESIGN AND SYNTHESIS OF CHIRAL LIGANDS / Chapter 2.1 --- Development of atropisomeric biaryls --- p.19 / Chapter 2.2 --- "Chiral 2,2'-bipyridine ligands" --- p.19 / Chapter 2.3 --- Design of chiral ligands --- p.22 / Chapter 2.4 --- Synthesis of target ligands: synthetic strategy --- p.22 / Chapter 2.5 --- Attempted synthesis of target ligands via cross-coupling reaction --- p.22