Heterogeneous Palladium Catalysts Applied to the Synthesis of 2- and 2,3-Functionalised Indoles
作者:Laurent Djakovitch、Véronique Dufaud、Rabah Zaidi
DOI:10.1002/adsc.200505283
日期:2006.4
Heterogeneouspalladiumcatalysts ([Pd(NH3)4]2+/NaY and [Pd]/SBA-15) were applied to the synthesis of 2-functionalised indoles, giving generally high conversions and selectivities (>89% yield) using only 1 mol % [Pd]-catalyst under standard reaction conditions (polar solvent, 80 °C). For the synthesis of 2,3-functionalisedindoles by cross-coupling arylation, the [Pd]/SBA-15 catalyst was found to be
Palladium-Catalyzed Direct 2-Alkylation of Indoles by Norbornene-Mediated Regioselective Cascade C–H Activation
作者:Lei Jiao、Thorsten Bach
DOI:10.1021/ja2055066
日期:2011.8.24
A palladium-catalyzed direct 2-alkylation reaction of free N-H indoles has been developed. This reaction relies on a norbornene-mediated cascade C-H activation process at the indole ring, which features high regioselectivity and excellent functional group, tolerance. The reaction represents the first example for a generally applicable, direct C-H alkylation of indole at the 2-position.
Mohri, Kunihiko; Oikawa, Yuji; Hirao, Ken-ichi, Chemical and pharmaceutical bulletin, 1982, vol. 30, # 9, p. 3097 - 3105