Abstract
Fluorinated chiral amines are highly important building blocks in medicinal chemistry since fluorine decreases the basicity of the amine functionality and, thus, improves the bioavailability of a drug molecule. Recently, stereoselective synthesis of fluorinated chiral amines based on the use of N-tert-butylsulfinyl imines has attracted much attention due to the high stereoselectivity, broad substrate scope and easy experimental handing. In this article, we summarize developments in the field over the last decade, including the synthesis of trifluoromethylated, difluoromethylated, gem-difluoromethylenated and monofluoromethylated chiral amines. Stereoselective synthesis of fluorinated chiral amines based on the use of N-tert-butylsulfinyl imines has been accomplished by two major strategies. One is the stereoselective addition or asymmetric reduction of fluorinated N-tert-butylsulfinyl imines and their derivatives. The other strategy is the asymmetric addition of fluorinated reagents to N-tert-butylsulfinyl imines, the development of which is lacking new efficient and atom-economic fluorinated reagents.
Acknowledgements
The authors would like to thank the National Natural Science Foundation of China (20825209, 20832008, 20772144) and the Chinese Academy of Sciences (Hundreds-Talent Program and Knowledge Innovation Program) for their financial support of this work.
Financial & competing interests disclosure
The authors would like to thank the National Natural Science Foundation of China (20825209, 20832008, 20772144) and the Chinese Academy of Sciences (Hundreds-Talent Program and Knowledge Innovation Program) for their financial support to this work. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.
No writing assistance was utilized in the production of this manuscript.