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
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.
Electron Donor–Acceptor Complex-Initiated Photochemical Cyanation for the Preparation of α-Amino Nitriles
作者:Qing Xia、Yufei Li、Lan Cheng、Xin Liang、Chenlin Cao、Peng Dai、Hongping Deng、Weihua Zhang、Qingmin Wang
DOI:10.1021/acs.orglett.0c03703
日期:2020.12.18
An electron donor–acceptor complex-initiated α-cyanation of tertiaryamines has been described. The reaction protocol provides a novel method to synthesize various α-aminonitriles under mild conditions. The reaction can proceed smoothly without the presence of photocatalysts and transition metal catalysts, and either oxidants are unnecessary or O2 is the only oxidant. The practicality of this method
Electrochemical strategies for <i>N</i>-cyanation of secondary amines and α <i>C</i>-cyanation of tertiary amines under transition metal-free conditions
作者:Zhengjiang Fu、Yaping Fu、Jian Yin、Guangguo Hao、Xuezheng Yi、Tingting Zhong、Shengmei Guo、Hu Cai
DOI:10.1039/d1gc02529e
日期:——
Transition metal-free electrochemical approaches for the N-cyanation of secondaryamines and the α C-cyanation of tertiaryamines have been well established, with products being obtained in moderate to good yields and with good functional group tolerance under ambient conditions. The synthetic application of the protocols has been highlighted through scale-up experiments in a galvanostatic mode. Preliminary
Electrochemically promoted oxidative α-cyanation of tertiary and secondary amines using cheap AIBN
作者:Qing-Wen Gui、Zhi-Yuan Xiong、Fan Teng、Tian-Cheng Cai、Qiang Li、Wenxia Hu、Xiaoli Wang、Jialing Yu、Xiaoying Liu
DOI:10.1039/d1ob01416a
日期:——
The electrochemical α-cyanation of tertiary and secondary amines has been developed by using a cheap cyanide reagent, azobisisobutyronitrile (AIBN). The CN radical, generated through n-Bu4NBr-meidated electrochemical oxidation, participates in a novel α-cyanation reaction under exogenous oxidant-free conditions.