Rhodium(III)‐Catalyzed Amidation of Unactivated C(sp
<sup>3</sup>
)H Bonds
作者:He Wang、Guodong Tang、Xingwei Li
DOI:10.1002/anie.201506323
日期:2015.10.26
Nitrogenation by direct functionalization of CHbonds represents an important strategy for constructing CN bonds. Rhodium(III)‐catalyzed direct amidation of unactivatedC(sp3)Hbonds is rare, especially under mild reaction conditions. Herein, a broad scope of C(sp3)Hbonds are amidated under rhodium catalysis in high efficiency using 3‐substituted 1,4,2‐dioxazol‐5‐ones as the amide source. The
Rh(III)-catalyzed regioselective trifluoromethylthiolation of the unactivated C(sp3)–H bond of 8-methylquinolines with bench-stable electrophilic trifluoromethylthiolating reagent via C(sp3)–H activation is explored. Various substituted 8-methylquinolines provided the products in good yields with high regioselectivity. Current reaction conditions are also applicable for the late-stage functionalization
Reported herein is the iridium-catalyzed direct amidation of unactivated sp(3) C-H bonds. With sulfonyl and acyl azides as the amino source, the amidation occurs efficiently under mild conditions over a wide range of unactivated methyl groups with high functional group tolerance. This procedure can be successfully applied for the direct introduction of an amino group into complex compounds and thus can serve as a powerful synthetic tool for late-stage C-H functionalization.