Development, Mechanism, and Application of Titanium(II/IV) Catalysed C-N Bond Forming Reactions

Abstract

This thesis describes the development of titanium catalysed C-N bond forming reactions of alkynes and diazenes. These reactions proceed through a TiIV/II catalytic cycle and a unique diazene cleavage step. Chapter 1 details previous titanium redox reactions for the formation of CX bonds. Chapters 2 and 3 describe the discovery, development, and mechanism of the titanium catalysed [2+2+1] coupling of alkynes and diazenes for the synthesis of multisubsituted pyrroles. Chapter 4 describes the 3-component coupling of alkenes, alkynes, and diazenes in the synthesis of α,β-unsaturated imines and α-(iminomethyl) cyclopropanes. Finally, Chapter 5 describes the development of a benchtop stable catalyst system for a series of titanium catalysed C-N and C-C bond forming reactions.