The Enantioselective, Organocatalyzed Diels-Alder Reaction of 2-Vinylindoles with α,β-Unsaturated Aldehydes: An Efficient Route to Functionalized Tetrahydrocarbazoles
Prolinol catalysts: A highly enantio‐ and diastereoselective prolinol‐catalyzedDiels–Alderreaction of 2‐vinylindoles and α,β‐unsaturated aldehydes is developed (see scheme). This methodology allows the development of further applications of prolinols in asymmetric synthesis. The resulting densely functionalized enantiomerically pure tetrahydrocarbazoles are useful in the total synthesis of natural
A hydrogen bonding-mediated double Michael addition−aromatization cascade of 2-propenylindoles and nitroolefins has been disclosed. The methodology allows an efficient synthesis of diverse and structurally complex tetrahydrocarbazoles in good to excellent enantioselectivities and diastereoselectivities.
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
Dinuclear Iron Complex-Catalyzed Cross-Coupling of Primary Alkyl Fluorides with Aryl Grignard Reagents
作者:Zhenbo Mo、Qiang Zhang、Liang Deng
DOI:10.1021/om300722g
日期:2012.9.24
Iron-catalyzed cross-coupling of nonactivated primary alkylfluorides with aryl Grignardreagents has been achieved by using the low-coordinate dinuclear iron complex [(IPr2Me2)Fe(μ2-NDipp)2Fe(IPr2Me2)] as the catalyst. This iron-catalyzed C(sp3)–F bond arylation reaction is applicable to a variety of aryl Grignardreagents and primary alkylfluorides. The product pattern suggests the involvement of a
Boron Lewis Acid-Catalyzed Hydrophosphinylation of <i>N</i>-Heteroaryl-Substituted Alkenes with Secondary Phosphine Oxides
作者:Jimin Han、Jongwon Kim、Jaehoo Lee、Younghun Kim、Sarah Yunmi Lee
DOI:10.1021/acs.joc.0c02246
日期:2020.12.4
secondary phosphine oxides that furnishes various phosphorus-containing N-heterocycles. This process proceeds under mild conditions and enables the introduction of a phosphorus atom into multisubstituted alkenylazaarenes. The available mechanistic data can be explained by a reaction pathway wherein the C–P bond is created by the reaction between the activated alkene (by coordination to a boron catalyst)