Total Syntheses of Naamine A and Naamidine A, Marine Imidazole Alkaloids
摘要:
The first total syntheses of naamine A (4) and naamidine A (5), marine imidazole alkaloids, were achieved through twelve and thirteen steps of reactions, respectively, starting from 1-methyl-2-phenylthio-1H-imidazole (17).
Site-Selective Copper-Catalyzed Amination and Azidation of Arenes and Heteroarenes via Deprotonative Zincation
作者:Charles E. Hendrick、Katie J. Bitting、Seoyoung Cho、Qiu Wang
DOI:10.1021/jacs.7b07661
日期:2017.8.23
effective for a wide range of arenes, including nonactivated arenes bearing simple functionalities such as fluoride, chloride, ester, amide, ether, nitrile, and trifluoromethyl groups as well as heteroarenes including indole, thiophene, pyridine, and isoquinoline. An analogous C-H azidation is also accomplished using azidoiodinane for direct introduction of a useful azide group onto a broad scope of arenes
Water Compatible Photoarylation of Amino Acids and Peptides
作者:Alex Sudakow、Uli Papke、Thomas Lindel
DOI:10.1002/chem.201402959
日期:2014.8.11
A novel photoarylation of aminoacids and peptides is described, which tolerates the presence of water. Irradiation of Boc‐protected aminoacids in the presence of N‐protected 2‐azidobenzimidazoles leads to selective arylation of carboxy termini or side chains. The new reaction also works for peptides. Irradiation of the nonapeptide H‐SPSYVYHQF‐OH also resulted in selective arylation of the tyrosine
Iron‐Mediated Electrophilic Amination of Organozinc Halides using Organic Azides
作者:Simon Graßl、Johannes Singer、Paul Knochel
DOI:10.1002/anie.201911704
日期:2020.1.2
arylated substrates with full retention of configuration. To demonstrate the utility of this reaction, we prepared two amine derivatives of pharmaceutical relevance using this iron-mediated electrophilicamination as the key step.
Quaternization of azido-N-heteroarenes with Meerwein reagent: A straightforward synthesis of 2-azido(benzo)imidazolium and related azido-N-heteroarenium tetrafluoroborates
2-Azido(benzo)imidazolium salts have been made through quaternization of 2-Azido(benzo)imidazoles with Meerwein reagent at ambient conditions. This one-pot protocol is also applicable to 4 or 3-azidopyridines and appropriate azido(iso)quinolines to prepare correlative azido-N-heteroarenium salts. When compared with their precursors, improved diazotransfer reactivity was observed for several representative