Iridium-catalyzed enantioselective hydroalkynylation via alkene isomerization
作者:Wen-Wen Zhang、Bi-Jie Li
DOI:10.1016/j.tetlet.2021.153108
日期:2021.6
An iridium-catalyzed enantioselective alkynylation of methylene CH bonds γ to the amide group is developed. The reaction proceeds through alkeneisomerization followed by regioselective hydroalkynylation. This method provides rapid access to a wide range of stereodefined alkynylated compounds in good yields and good enantioselectivities.
Amide-Forming Ligation of Acyltrifluoroborates and Hydroxylamines in Water
作者:Aaron M. Dumas、Gary A. Molander、Jeffrey W. Bode
DOI:10.1002/anie.201201077
日期:2012.6.4
Come together, right now: Acyltrifluoroborates and O‐benzoyl hydroxylamines come together to form amides in water (see scheme). The ligations are complete within minutes at room temperature and do not require any reagents or catalysts. The reaction has a broad substrate scope and tolerates unprotected functional groups.
A novel cycloisomerisation of oximes bearing non-activated C-C double bonds occurs in an Al(III)-catalysed reaction. This process leads to 5-,6- and 7-membered ring oxygen and nitrogen-containing heterocycles in good yields. (C) 2008 Elsevier Ltd. All rights reserved.
Cobalt- versus Ruthenium-Catalyzed Alder–Ene Reaction for the Synthesis of Credneramide A and B
作者:Florian Erver、Gerhard Hilt
DOI:10.1021/jo3007896
日期:2012.6.1
was accomplished by utilizing Alder–enereactions between a terminal alkene and an internal alkyne to generate the rather uncommon 1,4-diene substructure of these compounds. Moreover, two different short linear sequences toward these targets are evaluated using either a cobalt-catalyzedAlder–enereaction of 1-chloropent-1-yne or a ruthenium-catalyzed Alder–enereaction of 1-trimethylsilyl-1-pentyne