Catalytic Asymmetric Synthesis of Substituted 3-Hydroxy-2-Oxindoles
作者:Nadine V. Hanhan、Aziza H. Sahin、Toby W. Chang、James C. Fettinger、Annaliese K. Franz
DOI:10.1002/anie.200904393
日期:2010.1.18
used to catalyze the addition of indoles and other π nucleophiles to N‐alkylated and unprotected isatins (see picture). The resulting biologically relevant substituted3‐hydroxy‐2‐oxindoles were obtained in high yield with high enantioselectivity. Tf=trifluoromethanesulfonyl.
Atropoenantioselective synthesis of heterobiaryl N-oxides via dynamic kinetic resolution
作者:Xi Yuan、Jian Wang
DOI:10.1007/s11426-022-1402-9
日期:2022.12
A highly efficient enantioselective construction of heterobiaryl N-oxides was developed. A series of axially chiral heterobiaryl N-oxides were generated via the cascade reaction of aminobenzamides with heterobiaryl aldehydes in the presence of chiral phosphoric acids. A number of atropisomers were afforded in moderate to good yields with excellent enantioselectivities and diastereoselectivities. Preliminary