Cornell University
Library
Cornell UniversityLibrary

eCommons

Help
Log In(current)
  1. Home
  2. Cornell University Graduate School
  3. Cornell Theses and Dissertations
  4. HYDRAZINE-MEDIATED CARBONYL-OLEFIN METATHESIS: ANALYSIS OF HYDRAZINE STRUCTURES, RING-CLOSING REACTIONS, AND RING-OPENING REACTIONS

HYDRAZINE-MEDIATED CARBONYL-OLEFIN METATHESIS: ANALYSIS OF HYDRAZINE STRUCTURES, RING-CLOSING REACTIONS, AND RING-OPENING REACTIONS

File(s)
DeLaRosa_cornellgrad_0058F_15131.pdf (9.55 MB)
Permanent Link(s)
https://doi.org/10.7298/syhf-jg09
https://hdl.handle.net/1813/120839
Collections
Cornell Theses and Dissertations
Author
De La Rosa, Jose
Abstract

For years, the Lambert group has studied and exploited the use of hydrazines for carbonyl-olefin metathesis (COM). In trying to extend the capabilities of hydrazines, challenges have been identified that need to be addressed. This dissertation takes a closer look into the COM systems in addition to changes in the hydrazine system to identify these challenges, proved insights and propose potential solutions that could facilitate further developments. Chapter 1 of this dissertation introduces methods used for COM transformations. Chapter 2 focuses on the synthesis of 2,3-dihydrobenzoxepines via hydrazine-catalyzed ring-closing COM (RCCOM). The analysis of these reactions identifies problems of both substrate and hydrazine stability. Using 20 mol% of the [2.2.1] hydrazine, the product was obtained in 55% yield. Chapter 3 focuses on the analysis of norbornene reactivity as it pertains to ring-opening metathesis polymerization (ROMP) using hydrazines. Key to this discussion was the identification of the decomposition of our hydrazine salt and its replacement. Additionally, the analysis of the reaction between hydrazine and norbornene exposes a potential obstacle for efficient catalysis moving forward. Chapter 4 investigates the ring-opening COM (ROCOM) of cyclooctenes, with an investigation into the cyclic olefins that are tolerated with hydrazines and revels problematic steps. Chapter 5 presents hydrazines that were prepared and tested with various COM reactions, discussing the findings and what conclusions can be suggested from the results.

Description
255 pages
Date Issued
2025-08
Keywords
Carbonyl-Olefin Metathesis
•
Hydrazine Catalyst
Committee Chair
Lambert, Tristan
Committee Member
Lin, Song
Milner, Phillip
Degree Discipline
Chemistry and Chemical Biology
Degree Name
Ph. D., Chemistry and Chemical Biology
Degree Level
Doctor of Philosophy
Type
dissertation or thesis

Site Statistics | Help

About eCommons | Policies | Terms of use | Contact Us

copyright © 2002-2026 Cornell University Library | Privacy | Web Accessibility Assistance