Palladium-Catalyzed Intramolecular C-H Amination in Water
作者:Lizheng Yang、Hao Li、Haifei Zhang、Hongjian Lu
DOI:10.1002/ejoc.201601043
日期:2016.12
found to be effective for intramolecular C–H amination in water. With 2-azidobiphenyls as substrates, the reaction efficiently provided various carbazoles with N2 as the sole byproduct. The reaction showed high functional-group tolerance and could be used in the synthesis of several natural carbazole alkaloids. The catalytic process was promoted by water, and the reaction was inefficient in the organic
发现钯 (II) 催化对水中的分子内 C-H 胺化有效。以 2-叠氮联苯为底物,该反应有效地提供了各种咔唑,N2 作为唯一的副产物。该反应显示出高官能团耐受性,可用于合成多种天然咔唑生物碱。催化过程受水促进,在所研究的有机溶剂中反应效率低下。
Photochemical intramolecular amination for the synthesis of heterocycles
作者:Shawn Parisien-Collette、Corentin Cruché、Xavier Abel-Snape、Shawn K. Collins
DOI:10.1039/c7gc02261a
日期:——
formed in good to excellent yields via photochemical conversion of the corresponding substituted aryl azides under irradiation with purple LEDs in a continuous flow reactor. The experimental set-up is tolerant to UV-sensitive functional groups while affording diverse carbazoles, as well as an indole and pyrrole framework, in short reaction times. The photochemical method is presumed to progress through
Rh<sub>2</sub>(II)-Catalyzed Synthesis of Carbazoles from Biaryl Azides
作者:Benjamin J. Stokes、Brankica Jovanović、Huijun Dong、Kathleen J. Richert、Ryan D. Riell、Tom G. Driver
DOI:10.1021/jo9002536
日期:2009.4.17
An array of carbazoles (23 examples) can be synthesized from substituted biaryl azides at 60 degrees C using substoichiometric quantities of Rh-2(O2CC3F7)(4) or Rh-2(O2CC7H15)(4).
Visible-light-promoted intramolecular C–H amination in aqueous solution: synthesis of carbazoles
作者:Lizheng Yang、Yipin Zhang、Xiaodong Zou、Hongjian Lu、Guigen Li
DOI:10.1039/c7gc03392c
日期:——
An effective and operationally simpleprotocol is reported for the synthesis of versatile carbazoles. With water as a co-solvent, visible-light rather than various metals is used to facilitate the conversion of readily available 2-azidobiphenyls under mild conditions. Various functionalized bioactive natural alkaloids, such as glycoborine, clausine C, clausine L, clausine H and clauszoline K, were