Iridium‐Catalyzed Direct CH Amidation with Weakly Coordinating Carbonyl Directing Groups under Mild Conditions
作者:Jinwoo Kim、Sukbok Chang
DOI:10.1002/anie.201310544
日期:2014.2.17
An iridium‐catalyzed direct CH amidation of weakly coordinating substrates, in particular of those bearing ester and ketone groups, under very mildconditions has been developed. The observed high reaction efficiency was achieved by the combined use of acetic acid and lithium carbonate as additives.
Ruthenium-Catalyzed Direct CH Amidation of Arenes Including Weakly Coordinating Aromatic Ketones
作者:Jiyu Kim、Jinwoo Kim、Sukbok Chang
DOI:10.1002/chem.201301025
日期:2013.6.3
CH activation: The ruthenium‐catalyzed direct sp2 CHamidation of arenes by using sulfonyl azides as the amino source is presented (see scheme). A wide range of substrates were readily amidated including arenes bearing weakly coordinating groups. Synthetic utility of the thus obtained products was demonstrated in the preparation of biologically active heterocycles.
An efficient Ru(II)-catalyzed intermolecularamidation of weakly coordinating ketones with sulfonyl azides via C-H bond activation is described. The reaction proceeds with high functional group tolerance, providing a novel approach to practical ketone-directed intermolecular C-N bond formation in the absence of an additional oxidant.