Organocatalyzed, Visible-Light Photoredox-Mediated, One-Pot Minisci Reaction Using Carboxylic Acids via <i>N</i>-(Acyloxy)phthalimides
作者:Trevor C. Sherwood、Ning Li、Aliza N. Yazdani、T. G. Murali Dhar
DOI:10.1021/acs.joc.8b00205
日期:2018.3.2
one-pot Minisci reaction has been developed using visible light, an organic photocatalyst, and carboxylic acids as radical precursors via the intermediacy of in situ-generated N-(acyloxy)phthalimides. The conditions employed are mild, demonstrate a high degree of functional group tolerance, and do not require a large excess of the carboxylic acid reactant. As a result, this reaction can be applied to
protocol for direct C–H alkylation and acylation of N-heterocycles, using readily accessible carboxylic acids as radical precursors under visible-light irradiation without a photocatalyst and an additional acid additive, has been developed. This protocol provides expedient access to substituted N-heterocycles under mild and metal-free conditions. Mechanistic experiments indicate that this reaction proceeds
Visible-light-mediated photoredox minisci C–H alkylation with alkyl boronic acids using molecular oxygen as an oxidant
作者:Jianyang Dong、Fuyang Yue、Hongjian Song、Yuxiu Liu、Qingmin Wang
DOI:10.1039/d0cc05946c
日期:——
report a protocol for direct visible-light-mediated Minisci C–H alkylation reactions of heteroarenes with alkyl boronic acids using molecular oxygen as the sole oxidant. This mild protocol uses an inexpensive, green oxidant; permits efficient functionalization of various N-heteroarenes with a broad range of primary and secondaryalkyl boronic acids; and is scalable to the gram level. We demonstrated the
Visible-Light-Initiated Manganese Catalysis for C−H Alkylation of Heteroarenes: Applications and Mechanistic Studies
作者:Philippe Nuhant、Martins S. Oderinde、Julien Genovino、Antoine Juneau、Yohann Gagné、Christophe Allais、Gary M. Chinigo、Chulho Choi、Neal W. Sach、Louise Bernier、Yvette M. Fobian、Mark W. Bundesmann、Bhagyashree Khunte、Mathieu Frenette、Olugbeminiyi O. Fadeyi
DOI:10.1002/anie.201707958
日期:2017.11.27
A visible‐light‐driven Minisci protocol that employs an inexpensive earth‐abundant metal catalyst, decacarbonyldimanganese Mn2(CO)10, to generate alkyl radicals fromalkyliodides has been developed. This Minisci protocol is compatible with a wide array of sensitive functional groups, including oxetanes, sugar moieties, azetidines, tert‐butyl carbamates (Boc‐group), cyclobutanes, and spirocycles. The
Visible-light-mediated Minisci C–H alkylation of heteroarenes with unactivated alkyl halides using O<sub>2</sub> as an oxidant
作者:Jianyang Dong、Xueli Lyu、Zhen Wang、Xiaochen Wang、Hongjian Song、Yuxiu Liu、Qingmin Wang
DOI:10.1039/c8sc04892d
日期:——
visible-light-mediated Minisci C–H alkylation of heteroarenes with unactivated alkyl halides using molecular oxygen as an oxidant at room temperature. This mild protocol is compatible with a wide array of sensitive functional groups and has a broad substrate scope. Notably, functionalization of (iso)quinolines, pyridines, phenanthrolines, quinazoline, and other heterocyclic compounds with unactivated primary, secondary