Synthesis and nonplanar macrocyclic characters of hexa-, octa-, and decaphenylporphyrins
摘要:
Porphyrins bearing six, eight, and ten phenyl groups are synthesized using mixed condensation of benzaldehyde with pyrrole and diphenylpyrrole and their nonplanar macrocyclic characters are demonstrated by UV-visible and NMR spectroscopy.
Palladium-Catalyzed Indole, Pyrrole, and Furan Arylation by Aryl Chlorides
作者:Enrico T. Nadres、Anna Lazareva、Olafs Daugulis
DOI:10.1021/jo1018969
日期:2011.1.21
The palladium-catalyzed directarylation of indoles, pyrroles, and furans by aryl chlorides has been demonstrated. The method employs a palladium acetate catalyst, 2-(dicyclohexylphosphino)-biphenyl ligand, and an inorganic base. Electron-rich and electron-poor aryl chlorides as well as chloropyridine couplingpartners can be used, and arylated heterocycles are obtained in moderate to good yields.
TUNGSTEN OXO ALKYLIDENE COMPLEXES FOR Z SELECTIVE OLEFIN METATHESIS
申请人:Massachusetts Institute of Technology
公开号:US20130116434A1
公开(公告)日:2013-05-09
The current application describes tungsten oxo alkylidene complexes for olefin metathesis.
当前的申请描述了用于烯烃开环反应的钨氧烷基亚烯基配合物。
β-Selective C–H Arylation of Pyrroles Leading to Concise Syntheses of Lamellarins C and I
作者:Kirika Ueda、Kazuma Amaike、Richard M. Maceiczyk、Kenichiro Itami、Junichiro Yamaguchi
DOI:10.1021/ja508449y
日期:2014.9.24
The first generalβ-selectiveC-Harylation of pyrroles has been developed by using a rhodium catalyst. This C-Harylation reaction, which is retrosynthetically straightforward but results in unusual regioselectivity, could result in de novo syntheses of pyrrole-derived natural products and pharmaceuticals. As such, we have successfully synthesized polycyclic marine pyrrole alkaloids, lamellarins C
Base-Mediated Intermolecular sp<sup>2</sup> C−H Bond Arylation via Benzyne Intermediates
作者:Thanh Truong、Olafs Daugulis
DOI:10.1021/ja200184b
日期:2011.3.30
A transition-metal-free method for arylation of heterocycle and arene carbon-hydrogen bonds by aryl chlorides and fluorides has been developed. The reactions proceed via aryne intermediates and are highly regioselective with respect to the C-H bond coupling component.
Preparation of 1,2-Diaryl(heteroaryl)pyrroles and -3-methylpyrroles from <i>N</i>-Allylbenzotriazole
作者:Alan R. Katritzky、Lianhao Zhang、Jiangchao Yao、Olga V. Denisko
DOI:10.1021/jo000885x
日期:2000.11.1
Numerous 1,2-diaryl(heteroaryl)pyrroles and -3-methylpyrroles were prepared in a two-step procedure from N-allylbenzotriazoles via intramolecular oxidative cyclization in the presence of Pd(II) catalyst.