Palladium(0)-catalyzed Domino C−N Coupling/Hydroamination/C−H Arylation: Efficient Synthesis of Benzothieno[2′,3′:4,5]pyrrolo[1,2-<i>f</i>]phenanthridines
作者:Ghazwan Ali Salman、Ngo Nghia Pham、Thang Ngoc Ngo、Peter Ehlers、Alexander Villinger、Peter Langer
DOI:10.1002/adsc.201601285
日期:2017.4.17
efficient routes to benzothieno[2′,3′:4,5]pyrrolo[1,2‐f]phenanthridines have been developed. Alkynylated benzothiophenes reacted with various anilines to the target compounds in a domino reaction consisting of a C−N coupling‐, hydroamination‐ followed by a final, ring‐closing C−H arylation step. Products were isolated in moderate to good yields.
已开发出两条新的高效途径制备苯并噻吩并[2',3':4,5]吡咯并[1,2- f ]菲啶。炔基化苯并噻吩与各种苯胺在多米诺反应中与目标化合物反应,该反应由CN偶联,加氢胺化,随后的最终闭环CH芳基化步骤组成。分离产物的产率中等至良好。
Domino CN Coupling/Annulation versus CN Coupling/ Hydroamination of 2-Alkynyl-3-bromobenzothiophenes and 2-Alkynyl-3-bromothiophenes. Highly Efficient Synthesis of Benzothieno[3,2-b]quinolines and Thieno[3,2-b]pyrroles
作者:Ghazwan Ali Salman、Munawar Hussain、Viktor Iaroshenko、Alexander Villinger、Peter Langer
DOI:10.1002/adsc.201000709
日期:2011.2.11
palladium-catalyzed reaction of 2-alkynyl-3-bromothiophenes with anilines afforded thienopyrroles by a domino CN coupling/hydroamination process, the reaction of 2-alkynyl-3-bromobenzothiophenes with anilines resulted, under identical conditions, in the formation of benzothienoquinolines by a domino CN coupling/annulation process. The electronic character of the aniline also has an influence on the product distribution
Large geometrical structure changes of photochromic diarylethenes upon photoirradiation
作者:Kentaro Morimitsu、Seiya Kobatake、Masahiro Irie
DOI:10.1016/j.tetlet.2003.12.005
日期:2004.2
cycloreversion quantum yields of diarylethenes without affecting the absorption maxima and the absorption coefficients of the closed-ring isomers. The derivatives exhibited large geometricalstructural changes in the photoisomerization process.
NaBH4-TMEDA and a palladium catalyst as efficient regio- and chemoselective system for the hydrodehalogenation of halogenated heterocycles
作者:Giorgio Chelucci、Susanna Figus
DOI:10.1016/j.molcata.2014.06.012
日期:2014.11
Room-Temperature Hydrodehalogenation of Halogenated Heteropentalenes with One or Two Heteroatoms
作者:Giorgio Chelucci、Salvatore Baldino、Andrea Ruiu
DOI:10.1021/jo3019335
日期:2012.11.2
The pair NaBH4-TMEDA as a hydride source and catalytic PdCl2(4ppf) in THF prove to be an efficient system for the hydrodehalogenation of bromo(chloro)-heteropentalenes. with one or two heteroatoms, while Pd(OAc)(2)/PPh3 is able to reduce reactive haloheteropentalenes, and PdCl2(tbpf) allows the removal of the 2-chlorine from a thiophene ring. The reaction conditions tolerate various functional groups, allowing highly chemoselective reactions in the presence of halide, ester, alkyne, alkene, and nitrile substituents and also showing good efficiency in the regioselective hydrodehalogenation of a variety of polyhalogenated substrates.