The direct functionalization of inactive bonds is an ideal transformation in organic synthesis because the introduction of activating groups, such as halogens and metals, to substrates is unnecessary and by-products derived from them are not formed. This report describes several types of cationic iridium-catalyzed reactions that occur through C-H, N-H, or C-O bond cleavage. The carbonyl-directed sp2 C-H bond activation of aryl ketones realized new approaches to benzofulvene, benzofuran and indole synthesis, as well as the C2-position-selective alkylation of N-acyl-protected indoles. The enantioselective sp3 C-H alkylation of 2-(alkylamino)pyridines and the intermolecular enantioselective hydroamination of heteroaromatic amines gave various chiral amines. 0-to-7V-alkyl migration in 2-alkoxypyridines gave 7V-alkylpyridones via C-O bond cleavage.
|Number of pages||13|
|Journal||Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry|
|Publication status||Published - 2013|
ASJC Scopus subject areas
- Organic Chemistry