yielding, operationally simple (room temperature, no dry solvents or inert conditions, commercially available catalyst) reaction for the introduction of silylacetylenes on a large range of indole and pyrroleheterocycles with a wide range of functional groups (see scheme).
Mechanochemical Rhodium(III)‐ and Gold(I)‐Catalyzed C−H Bond Alkynylations of Indoles under Solventless Conditions in Mixer Mills
作者:Gary N. Hermann、Marvin T. Unruh、Se‐Hyeong Jung、Maik Krings、Carsten Bolm
DOI:10.1002/anie.201805778
日期:2018.8.13
processes show excellent functional group tolerance, do not require additional heating and proceed undersolventlessconditions. Compared to solvent‐based standard protocols, the reaction times are shorter and the catalyst quantities lower resulting in high product yields under ambient atmosphere in mixer mills.
The direct catalytic alkynylation/dehydrative cyclization of 2-amino-3-trifluoroacetyl-pyridines on water was developed for the efficient synthesis of a broad range of fluorinated 1,8-naphthyridines from terminal alkynes. A novel N-heterocycliccarbene (NHC) ligand system that combines a π-extended acenaphthylene backbone with sterically bulky pentiptycene pendant groups was successfully utilized in