Aerobic Palladium(II)-Catalyzed 5-endo-trig Cyclization: An Entry into the Diastereoselective C-2 Alkenylation of Indoles with Tri- and Tetrasubstituted Double Bonds
作者:Sandeep R. Kandukuri、Julia A. Schiffner、Martin Oestreich
DOI:10.1002/anie.201106927
日期:2012.1.27
The endo trick: An endo ring closure onto the trigonal β carbon atom of α,β‐unsaturated acceptors that are tethered to the indole nitrogen atom followed by amide cleavage enables the diastereoselective C‐2 alkenylation of indoles with fully substituted doublebonds. The carboxy group functions as a synthetically useful temporary tether (see scheme).