The development of new methods to achieve the direct synthesis of bioactive organic molecules is always an important topic in organic synthesis. We hereby demonstrate that N-methoxyamide is an excellent amino source in the iridium-catalyzed intermolecular C-H amination reaction. The linkage of two bioactive organic molecules can be well achieved with this new protocol. More than 20 examples of decorated
Potassium Poly(Heptazine Imide): Transition Metal‐Free Solid‐State Triplet Sensitizer in Cascade Energy Transfer and [3+2]‐cycloadditions
作者:Aleksandr Savateev、Nadezda V. Tarakina、Volker Strauss、Tanveer Hussain、Katharina Brummelhuis、José Manuel Sánchez Vadillo、Yevheniia Markushyna、Stefano Mazzanti、Alexander P. Tyutyunnik、Ralf Walczak、Martin Oschatz、Dirk M. Guldi、Amir Karton、Markus Antonietti
DOI:10.1002/anie.202004747
日期:2020.8.24
Polymeric carbon nitride materials have been used in numerous light‐to‐energy conversion applications ranging from photocatalysis to optoelectronics. For a new application and modelling, we first refined the crystalstructure of potassium poly(heptazine imide) (K‐PHI)—a benchmark carbon nitride material in photocatalysis—by means of X‐ray powder diffraction and transmission electron microscopy. Using
Metal-Catalyzed Synthesis of Functionalized 1,2,4-Oxadiazoles from Silyl Nitronates and Nitriles
作者:Paul Nikodemiak、Ulrich Koert
DOI:10.1002/adsc.201601378
日期:2017.5.17
to 1,2,4‐oxadiazoles is described. Silver(I) triflate (AgOTf) and and ytterbium(III) triflate [Yb(OTf)3] are suitable catalysts. A variety of functional groups is tolerated in the nitrile. The reaction works well for alkenyl and aryl silyl nitronates while the use of alkyl silyl nitronates is less efficient. Mechanistic studies are in favour of an elimination of tert‐butyl(dimethyl)silanol (TBSOH) after