四氢噻吩功能化的 N,S-杂环卡宾钯 (II) 配合物是通过使用三氟乙酸钯 (II) 而不是乙酸钯 (II)、溴化钯 (II) 或氯化钯 (II) 进行的意外重排合成的。通过 X 射线晶体学分离和表征了一系列这些复合物。探索了这些 [3.2.1] 钯双环的形成机制,并在代表性的 C-C 偶联反应中证明了这些配合物的催化能力。
Halo-Bridged Abnormal NHC Palladium(II) Dimer for Catalytic Dehydrogenative Cross-Coupling Reactions of Heteroarenes
作者:Sreejyothi P、Samaresh Chandra Sau、Pavan K. Vardhanapu、Swadhin K. Mandal
DOI:10.1021/acs.joc.8b01053
日期:2018.8.17
This work describes the dehydrogenative coupling of heteroarenes using a dimeric halo-bridged palladium(II) catalyst bearing an abnormal NHC (aNHC) backbone. The catalyst can successfully activate the C–Hbond of a wide range of heteroarenes, which include benzothiazole, benzoxazole, thiophene, furan, and N-methylbenzimidazole. Further, it exhibited good activity for heteroarenes bearing various functional
Palladium(II)-Catalyzed Oxidative C−H/C−H Cross-Coupling of Heteroarenes
作者:Peihua Xi、Fan Yang、Song Qin、Dongbing Zhao、Jingbo Lan、Ge Gao、Changwei Hu、Jingsong You
DOI:10.1021/ja909807f
日期:2010.2.17
of unsymmetrical biheteroaryl molecules has been developed via Pd(II)-catalyzed oxidative C-H/C-H cross-coupling of heteroarenes. An inversion in reactivity and selectivity has been achieved successfully to perform the desired heterocoupling. This process allows the heterocoupling of not only electron-rich N-containing heteroarenes (e.g., xanthines, azoles, and indolizines) but also electron-poor pyridine
已经通过 Pd(II) 催化的杂芳烃氧化 CH/CH 交叉偶联开发了一种合成不对称二杂芳基分子的有效方法。已成功实现反应性和选择性的反转以进行所需的异源偶联。该过程不仅允许富电子的含氮杂芳烃(例如黄嘌呤、唑类和吲哚嗪)杂偶联,而且允许贫电子的吡啶 N 氧化物与各种噻吩或呋喃杂偶联。
Synthesis and properties of 2-(2-furyl)-and 2-(2-Thienyl)-1,3-benzoxazoles
作者:A. A. Aleksandrov、E. V. Vlasova、M. M. El’chaninov
DOI:10.1134/s1070428010060205
日期:2010.6
and thenoyl chlorides in 1-methylpyrrolidin-2-one gave, respectively, 2-(2-furyl)- and 2-(2-thienyl)-1,3-benzoxazoles in which the furan and thiophene rings showed no acidophobic properties. Reactions of 2-(2-furyl)- and 2-(2-thienyl)-1,3-benzoxazoles with electrophilic reagents (acylation, bromination, nitration, and sulfonation) afforded products of hydrogen replacement in both hetaryl and benzene