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。
C–N bond formation via Cu-catalyzed cross-coupling with boronic acids leading to methyl carbazole-3-carboxylate: synthesis of carbazole alkaloids
作者:Sk. Rasheed、D. Nageswar Rao、K. Ranjith Reddy、S. Aravinda、Ram A. Vishwakarma、Parthasarathi Das
DOI:10.1039/c3ra44903c
日期:——
Copper promoted N-arylation of methyl 4-amino-3-iodobenzoate with boronic acids followed by Pd-catalyzed intramolecular CâH arylation provides an efficient route to methyl carbazole-3-carboxylate derivatives. This methodology was implemented in the synthesis of naturally occurring carbazole alkaloids clausine C, clausine H, clausine L, clausenalene, glycozoline, glycozolidine, glycozolidal and sansoakamine.
Synthesis of 2-Hydroxy-7-methylcarbazole, Glycozolicine, Mukoline, Mukolidine, Sansoakamine, Clausine-H, and Clausine-K and Structural Revision of Clausine-TY
作者:Christian Schuster、Carsten Börger、Konstanze K. Julich-Gruner、Ronny Hesse、Anne Jäger、Györley Kaufmann、Arndt W. Schmidt、Hans-Joachim Knölker
DOI:10.1002/ejoc.201402495
日期:2014.8
Buchwald–Hartwig amination and palladium(II)-catalyzed oxidative cyclization reaction sequence provided efficient access to a series of oxygenated tricyclic carbazoles. In the present work, this approach was applied to the total syntheses of the naturally occurring carbazole alkaloids 2-hydroxy-7-methylcarbazole, glycozolicine, mukoline, mukolidine, sansoakamine, glycozolidine, clausine-H (clauszoline-C)
Transition metals in organic synthesis - Part 83#: Synthesis and pharmacological potential of carbazoles
作者:Taylor A. Choi、Regina Czerwonka、Ronny Forke、Anne Jäger、Jan Knöll、Micha P. Krahl、Tilo Krause、Kethiri R. Reddy、Scott G. Franzblau、Hans-Joachim Knölker
DOI:10.1007/s00044-007-9073-0
日期:2008.6
the first naturally occurring carbazole alkaloids with antituberculosis (anti-TB) activity, clausine K and micromeline, a study on the structure–activity relationships for anti-TB-active carbazolederivatives has been carried out. The 6-oxygenated carbazoles glycozoline and glycozolinine show antibiotic activity towards several microorganisms. The 7-oxygenated carbazole siamenol exhibits anti-HIV activity
Reported herein is an environmentally benign electrochemical C−H bond dehydrogenative amination protocol for the construction of privileged carbazole moiety with broad generality. Preliminary mechanistic investigations implied a radical reaction pathway. Compared with traditional ionic routes, the scalable transition‐metal and exogenous‐oxidant free strategy highlighted the green and sustainable nature