The authors would like to dedicate this account to Prof. Ian J. S. Fairlamb.
Abstract
Caged phosphines have unique structures and provide many advantageous properties that
can be fine-tuned to develop efficient catalytic systems. Our research group recently
introduced a highly water-soluble caged phosphine: PTABS (KapdiPhos), which is a derivatized
form of triazaphosphaadamantane, and explored its applicability as a strongly π-accepting
ligand in combination with metals such as Pd or Cu in a variety of cross-coupling
reactions of biologically relevant halonucleosides as well as chloroheteroarenes.
This account details our journey from ideation to the various catalytic applications
of the ligands and eventually to its commercialization.
1 Introduction
2 Derivatization of PTA to PTABS and Its Applications
2.1 Nucleoside Modification
2.2 Heteroarene Modification
3 Conclusion
4 Summary and Future Outlook
Key words
caged phosphines - triazaphosphaadamantane - cross-coupling - palladium catalysis
- nucleosides - heteroarenes - active pharmaceutical ingredients