Thesis advisor: Shih-Yuan Liu / This dissertation describes the utility of 1,2-azaborine motif as a 4C+1B+1N synthon in organic synthesis, especially for the preparation of densely functionalized cyclobutanes based on the framework of the 1,2-azaborine photoisomerization. The substitution of a CC unit with a BN unit in benzenes significantly modifies the properties of classic benzenoid compounds, leading to new reactivities and functionalities. In this vein, Chapter 1 discloses photoisomerization of 1,2-azaborines to selectively form BN-analogues of the Dewar benzene. Three applications of the Dewar photoisomers are described herein: 1) a rhodium-catalyzed ring-opening reaction to form 1,2-azaborines; 2) furnishing cis aminoborylated cyclobutanes with the boron unit as a further functionalization handle; 3) a stereospecific ring-opening reaction to afford diene which can engage in Diels-Alder reaction. Chapter 2 elaborates on a modular and stereoselective strategy to access a variety of cyclobutane β-amino alcohols. Discussed herein are regioselective functionalizations and di-functionalizations of the 1,2-azaborine core and a tandem photoisomerization-hydrogenation-oxidation protocol to translate the functionalized azaborine core to cyclobutane amino alcohols. Also examined herein are the scope of azaborine photoisomerization and Dewar hydrogenation. / Thesis (PhD) — Boston College, 2022. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Chemistry.
| Identifer | oai:union.ndltd.org:BOSTON/oai:dlib.bc.edu:bc-ir_109474 |
| Date | January 2022 |
| Creators | Yang, Xinyu |
| Publisher | Boston College |
| Source Sets | Boston College |
| Language | English |
| Detected Language | English |
| Type | Text, thesis |
| Format | electronic, application/pdf |
| Rights | Copyright is held by the author, with all rights reserved, unless otherwise noted. |
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