"Rhodium(III)-Catalyzed Heterocycle Synthesis and New Approaches to Hig" by Nathaniel Scott Greenwood

Date of Award

Spring 2024

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Chemistry

First Advisor

Ellman, Jonathan

Abstract

Functionalization of imine C−H bonds allows for rapid and modular synthesis of nitrogen heterocycles which are present in nearly two-thirds of U.S. FDA approved drugs. The first chapter describes work on the synthesis of a class of nitrogen heterocycles by a new type of reaction, imidoyl C−H carbamylation. Unconventional chiral sulfur(VI) compounds, such as sulfoximines are also increasingly relevant to drug and agrochemical discovery. The second chapter details a catalytic enantioselective sulfur-alkylation of N-acylsulfenamides to access enantioenriched sulfilimine intermediates en route to sulfoximines. The third and fourth chapters demonstrate further methods to access sulfilimines by way of sulfur-arylation with commercially abundant boronic acid and aryl iodide inputs, respectively. Finally, the fifth chapter describes orthogonal methods to access N-acylsulfenamide starting inputs from abundant and diverse commercial materials through a sulfur-functionalization and elimination strategy.

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