Rh-Catalyzed Addition of Arylboroxines to Cyclic <i>N</i>-(Isopropanesulfinyl)ketimines
作者:Hyung Hoon Jung、Andrew W. Buesking、Jonathan A. Ellman
DOI:10.1021/jo301634y
日期:2012.11.2
Arylboroxines, which are easily accessed by drying commercially available arylboronic acids, are added to N-(isopropanesulfinyl)ketimines derived from cyclohexanone, N-Boc-piperidin-4-one, and tetrahydropyran-4-one in high yields and with excellent functional group compatibility via rhodium catalysis. These results contrast with additions to the corresponding ketimines incorporating the larger N-tert-butanesulfinyl group, which give considerably lower yields. Efficient two-step preparation of racemic isopropanesulfinamide from inexpensive isopropyl disulfide and recycling of the isopropanesulfinyl group from the addition products are also described.