Xuan, Jun Zhang, Zhao-Guo Xiao, Wen-Jing
Published in
Angewandte Chemie (International ed. in English)
Visible-light-induced radical decarboxylative functionalization of carboxylic acids and their derivatives has recently received considerable attention as a novel and efficient method to create CC and CX bonds. Generally, this visible-light-promoted decarboxylation process can smoothly occur under mild reaction conditions with a broad range of sub...
Yorsaeng, Sakkawet Kato, Yuka Tsutsumi, Ken Inagaki, Akiko Kitiyanan, Boonyarach Fujiki, Michiya Nomura, Kotohiro
Published in
Chemistry (Weinheim an der Bergstrasse, Germany)
Oligo(2,5-dialkoxy-1,4-phenylenevinylene)s containing three different chiral alkoxy substituents on the phenyl end groups with structurally regular (all trans) controlled repeat units have been prepared; these compounds showed highly enhanced aggregation-induced circular dichroism (AICD; formation of supramolecular polymers), and an inversion of th...
Tanifuji, Kazuki Lee, Chi Chung Ohki, Yasuhiro Tatsumi, Kazuyuki Hu, Yilin Ribbe, Markus W
Published in
Angewandte Chemie (International ed. in English)
Nitrogenase catalyzes substrate reduction at its cofactor center ([(Cit)MoFe7S9C](n-); designated M-cluster). Here, we report the formation of an artificial, nitrogenase-mimicking enzyme upon insertion of a synthetic model complex ([Fe6S9(SEt)2](4-); designated Fe6(RHH)) into the catalytic component of nitrogenase (designated NifDK(apo)). Two Fe6(R...
Amaya, Toru Hata, Dai Moriuchi, Toshiyuki Hirao, Toshikazu
Published in
Chemistry (Weinheim an der Bergstrasse, Germany)
A reduced form of polyaniline has been shown to induce direct arylation of an arenediazonium salt with an arene (Gomberg-Bachmann reaction) to give the cross-coupling product in moderate to good yields under mild conditions. Various arenediazonium salts and arenes, including heteroarenes such as furans, thiophenes, and pyrroles, are employed for th...
Sølvhøj, Amanda Ahlburg, Andreas Madsen, Robert
Published in
Chemistry (Weinheim an der Bergstrasse, Germany)
A new coupling reaction has been developed in which β-bromostyrenes react with ethers and tertiary amines to introduce the styryl group in the α-position. The transformation is mediated by Me2 Zn/O2 with 10 % MnCl2 and is believed to proceed by a radical addition-elimination mechanism. The ether and the amine are employed as solvent and the couplin...
Lichtenberg, Crispin Garcia Rubio, Inés Viciu, Liliana Adelhardt, Mario Meyer, Karsten Jeschke, Gunnar Grützmacher, Hansjörg
Published in
Angewandte Chemie (International ed. in English)
Enzymes and cofactors with iron-sulfur heterocubane core structures, [Fe4 S4 ], are often found in nature as electron transfer reagents in fundamental catalytic transformations. An artificial heterocubane with a [Fe4 N4 ] core is reported that can reversibly store up to four electrons at very negative potentials. The neutral [Fe4 N4 ] and the singl...
Gupta, Puneet K Yadav, Nisha Jaiswal, Subodh Asad, Mohd Kant, Ruchir Hajela, Kanchan
Published in
Chemistry (Weinheim an der Bergstrasse, Germany)
A highly efficient synthesis of phenanthridine/benzoxazine-fused quinazolinones by ligand-free palladium-catalyzed intramolecular C-H bond activation under mild conditions has been developed. The C-C coupling provides the corresponding N-fused polycyclic heterocycles in good to excellent yields and with wide functional group tolerance. © 2015 WILEY...
Cheng, Wan-Min Shang, Rui Yu, Hai-Zhu Fu, Yao
Published in
Chemistry (Weinheim an der Bergstrasse, Germany)
Enabled by merging iridium photoredox catalysis and palladium catalysis, α-oxocarboxylate salts can be decarboxylatively coupled with aryl halides to generate aromatic ketones and amides at room temperature. DFT calculations suggest that this reaction proceeds through a Pd(0) -Pd(II) -Pd(III) pathway, in which the Pd(III) intermediate is responsibl...
Miyamura, Hiroyuki Sonoyama, Arisa Hayrapetyan, Davit Kobayashi, Shū
Published in
Angewandte Chemie (International ed. in English)
While water-compatible Lewis acids have great potential as accessible and environmentally benign catalysts for various organic transformations, efficient immobilization of such Lewis acids while keeping high activity and without leaching of metals even under aqueous conditions is a challenging task. Self-assembled nanocomposite catalysts of organic...
Majumdar, Moumita Omlor, Isabell Yildiz, Cem B Azizoglu, Akin Huch, Volker Scheschkewitz, David
Published in
Angewandte Chemie (International ed. in English)
The complete reductive cleavage of the triple bond in carbon monoxide was achieved using a lithium disilenide at room temperature. The C-C-coupled product can be regarded as a silanone dimer with pending alkyne and silirene moieties and incorporates two equivalents of CO per disilenide unit. A formation mechanism via ketenyl intermediates is propos...
