Visible-Light-Mediated Direct Decarboxylative Acylation of Electron-Deficient Heteroarenes Using α-Ketoacids
作者:Sabyasachi Manna、Kandikere Ramaiah Prabhu
DOI:10.1021/acs.joc.9b00004
日期:2019.5.3
Acylation of electron-deficient heteroaromatic compounds has been developed using visible light. α-Ketoacids have been used as an efficient source of acyl radicals under photoredox conditions. The in situ generated acyl radicals from α-ketoacids have been coupled to a wide variety of electron-deficient heteroaromatic compounds in a Minisci type reaction. This method would be attractive to access biologically
Phosphite‐Catalyzed C−H Allylation of Azaarenes via an Enantioselective [2,3]‐Aza‐Wittig Rearrangement
作者:Abdul Motaleb、Soniya Rani、Tamal Das、Rajesh G. Gonnade、Pradip Maity
DOI:10.1002/anie.201906681
日期:2019.10
A phosphite-mediated [2,3]-aza-Wittig rearrangement has been developed for the regio- and enantioselective allylic alkylation of six-membered heteroaromatic compounds (azaarenes). The nucleophilic phosphite adducts of N-allyl salts undergo a stereoselective base-mediated aza-Wittig rearrangement and dissociation of the chiral phosphite for overall C-H functionalization of azaarenes. This method provides
Insertion of Isocyanides into N−Si Bonds: Multicomponent Reactions with Azines Leading to Potent Antiparasitic Compounds
作者:Kranti G. Kishore、Ouldouz Ghashghaei、Carolina Estarellas、M. Mar Mestre、Cristina Monturiol、Nicola Kielland、John M. Kelly、Amanda Fortes Francisco、Shiromani Jayawardhana、Diego Muñoz-Torrero、Belén Pérez、F. Javier Luque、Rocío Gámez-Montaño、Rodolfo Lavilla
DOI:10.1002/anie.201604109
日期:2016.7.25
is an efficient activating agent for azines in isocyanide‐based reactions, which then proceed through a key insertion of the isocyanide into a N−Si bond. The reaction is initiated by N activation of the azine, followed by nucleophilic attack of an isocyanide in a Reissert‐type process. Finally, a second equivalent of the same or a different isocyanide inserts into the N−Si bond leading to the final
Microwave-assisted C-C cross-coupling reactions of aryl and heteroaryl halides in water
作者:Kamal M. Dawood、Moteaa M. El-Deftar
DOI:10.3998/ark.5550190.0011.930
日期:——
The catalytic activity of a benzimidazole-oxime Pd(II)-complex towards Suzuki and Heck C-Ccross-couplingreactions of activated and deactivated aryl- and heteroaryl bromides under microwave irradiation as well as thermal heating using water as a green solvent was evaluated. The turnover frequency reached 420,000 under microwave condition.
评估了苯并咪唑-肟 Pd(II)-配合物在微波照射下以及使用水作为绿色溶剂的热加热下对 Suzuki 和 Heck CC 交叉偶联反应的活化和失活芳基溴化物和杂芳基溴化物的催化活性。微波条件下周转次数达到42万次。