Highly Efficient Route to Fused Polycyclic Aromatics via Palladium-Catalyzed Aryne Annulation by Aryl Halides
作者:Zhijian Liu、Richard C. Larock
DOI:10.1021/jo0619534
日期:2007.1.1
Polycyclic aromatic and heteroaromatic hydrocarbons have been synthesized in high yield by two different processes involving the Pd-catalyzed annulation of arynes. The first process involves a Pd-catalyzed annulation of arynes by 2-halobiaryls and related vinylic halides. The second process utilizes a Pd-catalyzed double annulation of arynes by simple aryl halides. Both processes appear to involve
Palladium-catalyzed tandem N–H/C–H arylation: regioselective synthesis of N-heterocycle-fused phenanthridines as versatile blue-emitting luminophores
作者:Lipeng Yan、Dongbing Zhao、Jingbo Lan、Yangyang Cheng、Qiang Guo、Xiaoyu Li、Ningjie Wu、Jingsong You
DOI:10.1039/c3ob41760c
日期:——
A general and highly regioselective synthetic protocol for structurally diverse N-heteroaryl-fused phenanthridines has been developed. Varieties of fluorescence molecules comprising imidazole-fused, benzoimidazole-fused, indole-fused and pyrrole-fused phenanthridines were obtained by this modular approach, some of which exhibit excellent blue-emitting performance, high quantum yields, long fluorescence lifetimes, interesting electrochemical properties, and thermal stabilities.
Condensed N‐heterocycles were prepared by using iterative C−H bond activation reactions catalyzed by palladium. The first step consists of a palladium‐catalyzeddirect desulfitative C−H bond arylation of brominated N‐benzylpyrrole derivatives with benzenesulfonyl chlorides. The presence of the bromine atom allows the formation in the second step of several N‐heterocycles with five‐, six‐, or seven‐membered
One‐Pot Synthesis of Pyrrolo[1,2‐
<i>f</i>
]phenanthridines From 1‐Arylpyrroles
<i>via</i>
Successive Palladium‐Catalyzed Direct Arylations
作者:Jian Zhang、Xinzhe Shi、Henri Doucet
DOI:10.1002/ejoc.202100766
日期:2021.9.21
A wide variety of pyrrolo[1,2-f]phenanthridines can be obtained from commercially available compounds using only 2 mol% of easily available Pd(OAc)2 catalyst precursor and KOAc as inexpensive base. With this synthetic scheme, the introduction of desired functional groups at positions 5, 6, 7, 8, 10 and 11 of pyrrolo[1,2-f]phenanthridines is possible.
多种吡咯并[1,2- f ]菲啶可以从市售化合物中获得,仅使用 2 mol% 容易获得的 Pd(OAc) 2催化剂前体和 KOAc 作为廉价碱。通过该合成方案,可以在吡咯并[1,2- f ]菲啶的5、6、7、8、10和11位引入所需的官能团。
Synthesis of 1,3-Azaphospholes with Pyrrolo[1,2-<i>a</i>]quinoline Skeleton and Their Optical Applications
A facile synthesis of 1,3-azaphospholes with a pyrrolo[1,2-a]quinolineskeleton has been described. These new annulated 1,3-azaphospholes exhibit good photoelectric performance and can be used as the emitting dopant in organic light-emitting diodes (OLEDs) and dye for bioimaging.
已经描述了具有吡咯并[1,2- a ]喹啉骨架的1,3-氮杂膦的容易的合成。这些新型的1,3-氮杂磷杂环化合物具有良好的光电性能,可用作有机发光二极管(OLED)和生物成像染料的发射掺杂剂。