The Iridium‐catalyzedasymmetrichydrogenation of cyclic sulfamidate imines was successfully developed with N‐methylated ZhaoPhos L2 as the ligand. A variety of chiral cyclic sulfamidates were obtained with excellent results (up to 99% yield, 99% ee). Furthermore, this asymmetrichydrogenation can be employed as the key reaction step to prepare the important intermediates in organic synthesis.
Photosensitized [4+2]‐ and [2+2]‐Cycloaddition Reactions of <i>N</i>‐Sulfonylimines
作者:Wang Wang、M. Kevin Brown
DOI:10.1002/anie.202305622
日期:2023.8.7
Dearomative [4+2]-cycloadditions and azetidine-forming [2+2] cycloadditions (aza-Paternó-Büchi reactions) of sulfonylimines are presented. The divergent reactivity was achieved though substrate modulation. In both cases, the reactions lead to the synthesis of complex polycyclic scaffolds from simple components. The mechanistic details and the utility of the products are described.