Diarylation of Alkenes by a Cu-Catalyzed Migratory Insertion/Cross-Coupling Cascade
摘要:
A strategy for the catalytic diarylation of alkenes is presented. The method involves the migratory insertion of alkenes into an Ar-Cu complex to generate a new C(sp(3))-Cu complex, which subsequently undergoes reaction with an aryl iodide to constitute a vicinal diarylation of an alkene. The method provides access to benzofuran- and indoline-containing products. Furthermore, highly diastereoselective examples are presented, allowing access to complex, stereochemically rich structures from simple alkene starting materials.
Palladium-Catalyzed Tandem Oxidative Arylation/Olefination of Aromatic Tethered Alkenes/Alkynes
作者:Yang Gao、Yinglan Gao、Wanqing Wu、Huanfeng Jiang、Xiaobo Yang、Wenbo Liu、Chao-Jun Li
DOI:10.1002/chem.201605351
日期:2017.1.18
We describe herein a palladium‐catalyzed tandem oxidative arylation/olefination reaction of aromatic tethered alkenes/alkynes for the synthesis of dihydrobenzofurans and 2 H‐chromene derivatives. This reaction features a 1,2‐difunctionalization of C−C π‐bond with two C−H bonds using O2 as terminal oxidant at room temperature. The products obtained are valuable synthons and important scaffolds in biological
Electrochemical selenofunctionalization of unactivated alkenes: access to β-hydroxy-selenides
作者:Anil Balajirao Dapkekar、Gedu Satyanarayana
DOI:10.1039/d4ob00105b
日期:——
2-(2-hydroxy-2-methyl-3-(arylselanyl)propoxy)benzoate starting from aryl allyl ethers/allylbenzoates and diaryl diselenides under additive-free electrochemical conditions. This environmentally friendly method was achieved through constant current electrolysis in an undivided cell setup under acid, oxidant, or catalyst-free conditions. Additionally, this technique enabled the synthesis of a variety of β-hydroxy selenides
A recording material contains an electron donating leuco dye and, as an electron accepting compound, a salicylic acid derivative having an alkyl group, an alkoxy group or an aryloxy group as a substituent or a metal salt thereof. The recording material has good color developability, working preservability and stability.