Dehydrogenative C(sp<sup>3</sup>)–H bond functionalization of tetrahydroisoquinolines mediated by organic oxidants under mild conditions
作者:Zdravko Džambaski、Bojan P. Bondžić
DOI:10.1039/c9ob01090d
日期:——
The organocatalyzed Mannich reaction of unsubstituted and N-aryl-substituted tetrahydroisoquinolines (THIQs) and the Strecker reaction of several N-aryl-substituted THIQs through dehydrogenative C(sp3)-H bond functionalization (cross-dehydrogenative coupling) promoted by organic single electron oxidants DDQ and IBX are presented. The C-H oxidation/Mannich reaction of less reactive N-aryl substituted
Tetrathienoanthracene-functionalized conjugated microporous polymers as an efficient, metal-free visible-light solid organocatalyst for heterogeneous photocatalysis
作者:Chang-An Wang、Jian-Ping Zhang、Kun Nie、Yan-Wei Li、Qun Li、Guo-Zheng Jiao、Jian-Guo Chang、Yin-Feng Han
DOI:10.1039/d1cy00488c
日期:——
and molecularly tunable optoelectronic properties, conjugatedmicroporouspolymers (CMPs) have been receiving increasing attention and research interest as promising alternatives to traditional inorganic semiconductors for heterogeneous photocatalysis. Herein, we report the concise synthesis of tetrathienoanthracene-based conjugatedmicroporouspolymers (TTA-CMP) via a bottom-up strategy. TTA-CMP was
Dual catalysis: combining photoredox and Lewis base catalysis for direct Mannich reactions
作者:Magnus Rueping、Carlos Vila、René M. Koenigs、Konstantin Poscharny、David C. Fabry
DOI:10.1039/c0cc04539j
日期:——
A dual catalytic system combining photoredox and Lewis base catalysis has been developed. By the appropriate choice of light source and catalyst, the photoredox cycle can be optimally modulated to match the base catalyzed reaction cycle to provide the corresponding products under mild reaction conditions.
Light-Mediated Heterogeneous Cross Dehydrogenative Coupling Reactions: Metal Oxides as Efficient, Recyclable, Photoredox Catalysts in CC Bond-Forming Reactions
作者:Magnus Rueping、Jochen Zoller、David C. Fabry、Konstantin Poscharny、René M. Koenigs、Thomas E. Weirich、Joachim Mayer
DOI:10.1002/chem.201103242
日期:2012.3.19
Let there be light: A heterogeneous photocatalytic system based on easily recyclable TiO2 or ZnO allows cross dehydrogenative coupling reactions of tertiary amines. The newly developed protocols have successfully been applied to various CC and CP bond‐formingreactions to provide nitro amines as well as amino ketones, nitriles and phosphonates.
Highly efficient heterogeneous aerobic oxidative C–C coupling from C<sub>sp3</sub>–H bonds by a magnetic nanoparticle-immobilized bipy–gold(<scp>iii</scp>) catalyst
作者:Weisen Yang、Li Wei、Tao Yan、Mingzhong Cai
DOI:10.1039/c6cy02567f
日期:——
cross-dehydrogenative coupling (CDC) of tertiary amines with nitroalkanes and various unmodified ketones was achieved by using a magnetic nanoparticle-immobilized bipy–gold(III) complex as catalyst and air as the soleoxidant to afford the corresponding C–Ccoupling products in good to excellent yields under mild reaction conditions. The new heterogeneous gold catalyst can easily be separated from the reaction mixture