Novel aspects on the reaction of trialkyl-(1-methylindol-2-yl)borates
作者:Minoru Ishikura、Masanao Terashima
DOI:10.1039/c39890000135
日期:——
A new use of trialkyl-(1-methylindol-2-yl)borates for the synthesis of 2-substituted indoles involving the palladium catalysed cross-coupling with vinylic and aromatic halides, or a facile alkyl migration from boron to carbon without an additional electrophile is described.
Synthesis of Indole Substituted Twistenediones from a 2-Quinonyl Boronic Acid
作者:Jaime Rojas-Martín、Marcos Veguillas、María Ribagorda、M. Carmen Carreño
DOI:10.1021/ol402689b
日期:2013.11.15
Indole substituted twistane-like derivatives resulted in a reaction between 3,5-dimethyl-2-quinonyl boronic acid and 2-alkenyl indoles. Their MCPBA oxidation gave 6/6/9 caged systems. Boronic acid acts as a temporal promoter allowing a site-selective conjugate addition of the heteroaromatic system to the methyl substituted C-3 quinone carbon, giving an intermediate diene which is regioselectively trapped
A new utilization of the reaction of (1-methyl-2-indolyl)cyanocuprate with electrophiles
作者:Minoru Ishikura、Masanao Terashima
DOI:10.1039/c39890000727
日期:——
The reaction of (1-methyl-2-indolyl)cyanocuprate with electrophiles can provide 2- or 3-substituted indoles, selectively.
(1-甲基-2-吲哚基)氰基丙酸酯与亲电试剂的反应可以选择性地提供2-或3-取代的吲哚。
Asymmetric Vinylogous Diels-Alder Reactions Catalyzed by a Chiral Phosphoric Acid
作者:Xu Tian、Nora Hofmann、Paolo Melchiorre
DOI:10.1002/anie.201310487
日期:2014.3.10
to extend the synthetic utility of the Diels–Alder reaction to include a vinylogous reactivity space is described. A commercially available chiralphosphoricacid catalyst effectively activates cyclic 2,4‐dienones towards a vinylogous [4+2] cycloaddition with 2‐vinylindoles, which leads to stereochemically dense tetrahydrocarbazoles. The reaction proceeds with a high level of remote stereocontrol and
Generation and Utility of Cyclic Dienyl Gold Carbene Intermediates
作者:Cheng Zhang、Kemiao Hong、Shanliang Dong、Mengting Liu、Matthias Rudolph、Martin C. Dietl、Jian Yin、A. Stephen K. Hashmi、Xinfang Xu
DOI:10.1021/acscatal.2c06188
日期:——
carbene species (Au-CDC) via a selective gold-promoted diazo-enyne carbocyclization process. Following cycloadditions of these in situ formed carbene intermediates with different types of dipolarophiles are disclosed, producing a diverse array of fused and bridged skeletons with high chemo- and stereoselectivity. This method provides a tool resulting in straightforward access to ring systems with structural