Manganese catalyzed C–H functionalization of indoles with alkynes to synthesize bis/trisubstituted indolylalkenes and carbazoles: the acid is the key to control selectivity
作者:Lijun Shi、Xiang Zhong、Houde She、Ziqiang Lei、Fuwei Li
DOI:10.1039/c5cc00249d
日期:——
The Mn-catalyzed C–H alkenylations of indole with terminal- and/or internal-alkynes have been developed to selectively yield indolylalkene and carbazole.
A ruthenium-catalyzed C2-hydroindolation of alkynes has been achieved. This protocol provides a rapid and concise access to kinds of 2-alkenyl-substituted N-(2-pyridyl)-indoles in which the pyridyl moiety can be easily removed to afford free (N H) indoles under mild conditions. Various arenes and alkynes, including electron-deficient and electronrich internal alkynes and terminal alkynes, allow for this transformation.