idw - Informationsdienst
Wissenschaft
Chemists at the University of Münster have developed a novel and straightforward way to produce complex organic molecules. Mild reaction conditions, simple operation, scalability and the use of an inexpensive and commercially available photosensitizer make the method interesting for industrial applications. The results of the study are currently (Aug. 1) published in Nature Chemistry.
Chemists at the University of Münster have developed a novel and straightforward way to produce complex organic molecules. Mild reaction conditions, simple operation, scalability and the use of an inexpensive and commercially available photosensitizer make the method interesting for industrial applications. The results of the study are currently (Aug. 1) published in Nature Chemistry.
"Visible light has proven to be a powerful tool for the synthesis of complex organic molecules," explains Prof. Dr. Frank Glorius. "With its energy, we succeed in breaking certain chemical bonds X-Y." The resulting X and Y fragments are highly reactive, so-called "radicals." They can rapidly react with olefins A in a controlled manner, creating biologically valuable molecules (X-A-Y): β-amino acids. In this way, the Glorius group has succeeded in synthesizing a bifunctional oxime oxalate ester that provides both amine and ester functionalities for the reaction via an energy transfer strategy (EnT). This metal-free and mild method also features a broad substrate palette with up to 140 examples and excellent tolerance to sensitive functional groups. "Substrates ranging from the simplest ethylene to complex (hetero)arenes can participate in the reaction, providing general and practical access to β-amino acid derivatives - even those with previously inaccessible structural features." β-Amino acids are frequently used as important components in numerous biologically active molecules, such as drugs and natural products.
About the method
The aminocarboxylation reaction was carried out under simple and mild photochemical conditions. The authors of the study used an inexpensive and commercially available thioxanthone as the organic photosensitizer. Most other methods for the preparation of β-amino acid derivatives require metal-mediated multistep manipulations of pre-functionalized substrates. In contrast, energy transfer enables a metal-free, highly regioselective intermolecular reaction for the one-step incorporation of both amine and ester functionalities into alkenes or (hetero)arenes. For the simultaneous formatin of C-centered ester and N-centered iminyl radicals, an oxime oxalic acid ester was used as a bifunctional reagent.
Funding
The study was financially supported by the Alexander von Humboldt Foundation and the German Research Foundation (SFB 858). In addition, the Institute for Basic Science (IBS-R010-D1) of the Republic of Korea contributed to the success by financially supporting a study abroad.
Prof. Dr. Frank Glorius
University of Münster
Organisch-Chemisches Institut
Phone: +49 251 8335345
Mail: glorius@uni-muenster.de
https://doi.org/10.1038/s41557-022-01008-w Guangying Tan, Mowpriya Das, Hyeyun Keum, Peter Bellotti, Constantin Daniliuc and Frank Glorius: Photochemical single-step synthesis of β-amino acid derivatives from alkenes and (hetero)arenes. Nature Chemistry (2022); DOI: 10.1038/s41557-022-01008-w
Blue light is used as a tool for the synthesis of complex molecules called β-amino acid derivatives. ...
AG Glorius
Merkmale dieser Pressemitteilung:
Journalisten
Chemie
überregional
Forschungsergebnisse
Englisch
Sie können Suchbegriffe mit und, oder und / oder nicht verknüpfen, z. B. Philo nicht logie.
Verknüpfungen können Sie mit Klammern voneinander trennen, z. B. (Philo nicht logie) oder (Psycho und logie).
Zusammenhängende Worte werden als Wortgruppe gesucht, wenn Sie sie in Anführungsstriche setzen, z. B. „Bundesrepublik Deutschland“.
Die Erweiterte Suche können Sie auch nutzen, ohne Suchbegriffe einzugeben. Sie orientiert sich dann an den Kriterien, die Sie ausgewählt haben (z. B. nach dem Land oder dem Sachgebiet).
Haben Sie in einer Kategorie kein Kriterium ausgewählt, wird die gesamte Kategorie durchsucht (z.B. alle Sachgebiete oder alle Länder).