Du, Qingwei (2017). Studies in Enantioselective Transition Metal Catalysis Using Modular Phosphine-Phosphite Ligands; Gold-catalyzed Cycloaddition of 2-(1-Alkynyl)-2-alken-1-ones to Azomethine Imines. PhD thesis, Universität zu Köln.
|
PDF
Thesis.pdf Download (4MB) |
Abstract
The 1,3-dipolar cycloaddition, as a powerful method, was widely applied in the regio- and stereoselective synthesis of heterocycles and their ring-opened acyclic derivatives. In this work, a novel gold(I)-catalyzed 1,3-dipolar cycloaddition of 2-(1-alkynyl)-2-alken-1-ones with N,N’-cyclic azomethine imines is described, which provides a practical, efficient, regiospecific, and highly diastereoselective route to novel heterobicyclic highly substituted furo[3,4-d]pyridazines. Furthermore, enantioselective gold(I)-catalyzed cycloaddition of 2-(1-alkynyl)-2-alken-1-ones with N,N’-cyclic azomethine imines is also developed by using Taddol-derived phosphine-phosphite ligands, the so-called SchmalzPhos ligands. Under optimized reaction conditions, a variety of optically active highly substituted furo[3,4-d]pyridazines could be synthesized with excellent yields and high enantioselectivities.
Item Type: | Thesis (PhD thesis) | ||||||||||||||
Translated abstract: |
|
||||||||||||||
Creators: |
|
||||||||||||||
URN: | urn:nbn:de:hbz:38-78464 | ||||||||||||||
Date: | 23 October 2017 | ||||||||||||||
Language: | English | ||||||||||||||
Faculty: | Faculty of Mathematics and Natural Sciences | ||||||||||||||
Divisions: | Ehemalige Fakultäten, Institute, Seminare > Erziehungswissenschaftliche Fakultät > Institut für Chemie und ihre Didaktik | ||||||||||||||
Subjects: | Chemistry and allied sciences Life sciences Medical sciences Medicine |
||||||||||||||
Uncontrolled Keywords: |
|
||||||||||||||
Date of oral exam: | 25 January 2017 | ||||||||||||||
Referee: |
|
||||||||||||||
Refereed: | Yes | ||||||||||||||
URI: | http://kups.ub.uni-koeln.de/id/eprint/7846 |
Downloads
Downloads per month over past year
Export
Actions (login required)
View Item |