Exceptionally Mild Palladium(II)-Catalyzed Dehydrogenative C–H/C–H Arylation of Indolines at the C-7 Position under Air
作者:Lin-Yu Jiao、Polina Smirnov、Martin Oestreich
DOI:10.1021/ol503035z
日期:2014.11.21
method for the dehydrogenative C–H/C–H cross-coupling at the C-7 position of indolines containing a urea as a directing group is reported. The new protocol is a rare example of an aerobic palladium(II)-catalyzed crossdehydrogenativecoupling (CDC) reaction that proceeds at low temperature. The use of either Cu(OAc)2 in an open flask or dioxygen (balloon) at 50 °C tolerates indolines not substituted