Formal Umpolung Addition of Phosphites to 2‐Azaaryl Ketones under Chiral Brønsted Base Catalysis: Enantioselective Protonation Utilizing [1,2]‐Phospha‐Brook Rearrangement
作者:Azusa Kondoh、Takayuki Hirozane、Masahiro Terada
DOI:10.1002/chem.202201240
日期:2022.7.26
The catalyticenantioselectiveprotonation of α-oxygenated (2-azaaryl)methyl anions generated through the formal umpolung addition of the anion of dialkyl phosphites to 2-azaaryl ketones utilizing the [1,2]-phospha-Brook rearrangement was demonstrated with chiral bis(guanidino)iminophosphorane organosuperbase. This is a rare example of the catalyticenantioselectiveprotonation of transient carbanions