Palladium-catalyzed synthesis of 1,2-dihydro-4(3H)-carbazolones. Formal total synthesis of murrayaquinone A
摘要:
Two sequential palladium-catalyzed reactions are the key steps in a novel synthetic route to 1,2-dihydro-4(3H)-carbazolones. The steps are an intermolecular Stille cross-coupling followed by a reductive N-heteroannulation. A formal total synthesis of murrayaquinone A, employing this sequence, is reported. (C) 2003 Elsevier Ltd. All fights reserved.
Total synthesis of (±)-leuconolam: intramolecular allylic silane addition to a maleimide carbonyl group
作者:Enver Cagri Izgu、Thomas R. Hoye
DOI:10.1039/c3sc00056g
日期:——
A concise total synthesis of the plant alkaloid (+/-)-leuconolam (1) has been achieved. A regio- and diastereoselective Lewis-acid mediated allylative cyclization was used to establish, simultaneously, two adjacent tetrasubstituted carbon centers. Furthermore, an essential arene cross-coupling to a hindered haloalkene was enabled by the use of a novel 2-anilinostannane.
Preparation of Aryltributyltin Having Electron-withdrawing Group by Palladium Catalyzed Reaction of Hexabutylditin with Aryl Iodide
作者:Masanori Kosugi、Takao Ohya、Toshihiko Migita
DOI:10.1246/bcsj.56.3855
日期:1983.12
Nitro-, acyl-, and cyanophenyltributyltin can be prepared by the reaction of hexabutylditin with the corresponding aryl iodide in the presence of a catalytic amount of tetrakis(triphenylphosphine)palladium.
o-(Trialkylstannyl)anilines and their utility in Migita–Kosugi–Stille cross-coupling: direct introduction of the 2-aminophenyl substituent
作者:Enver Cagri Izgu、Thomas R. Hoye
DOI:10.1016/j.tetlet.2012.06.138
日期:2012.9
We have developed shelf- and air-stable ortho-stannylated aniline reagents that can directly be coupled with alkenyl and aryl halides via Migita–Kosugi–Stille cross-coupling. We report (i) the efficientpreparation of o-(tributylstannyl)aniline (2a) and o-(trimethylstannyl)aniline (2b), (ii) the comparison of the reactivities of 2a and 2b with those of related organostannanes in cross-coupling reaction
Synthesis of 1,2,3,4-tetrahydrocarbazoles and related tricyclic indoles
作者:Tricia L. Scott、Nicholas Burke、Grissell Carrero-Martínez、Björn C.G. Söderberg
DOI:10.1016/j.tet.2006.11.052
日期:2007.1
Reduction of 2-(2-nitrophenyl)-2-cyclohexene-1-ones using palladium on carbon under 1 atm of hydrogen gas at ambient temperature affords 1,2,3,4-tetrahydrocarbazoles in excellent isolated yields. The starting materials were prepared by intermolecular Stille coupling of 2-iodo-2-cyclohexen-1-ones with 2-(tributylstannyl)-1-nitrobenzenes.
Indoles having an ester functionality in the 3-position were prepared from 2-(2-nitrophenyl)propenoic acid derivatives via a palladium-catalyzed reductive N-heteroannulation using carbon monoxide as the ultimate reducingagent. The starting materials were prepared either by a Stille coupling of 2-halo-1-nitrobenzenes with ethyl 2-(tributylstannyl)-2-propenoate or by vicarious nucleophilic substitution