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 double bonds. The carboxy group functions as a synthetically useful temporary tether (see scheme).
的 内切 特技:一个内闭环到α的三角β碳原子,被拴在
吲哚氮原子β不饱和受体随后酰胺裂解实现与完全取代的双键的
吲哚的非对映选择性C-2烯基化。羧基用作合成有用的临时系链(请参阅方案)。