由取代的2-碘苯胺的Boc酰胺和烷基乙烯基酮分三步合成取代的喹啉。该方法包括:(1)在MeCN中在Cs 2 CO 3存在下,将2-碘苯胺的Boc酰胺N-迈克尔加成到烷基乙烯基酮上;(2)将加合物与3.5当量的i- PrMgCl·LiCl进行I-Mg交换,以及(3)所得醇的酸催化反应(EtOH中过量的AcCl)。给出了六个具有高收率的示例。
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
Visible-Light-Mediated C–H Alkylation of Pyridine Derivatives
作者:Fatima Rammal、Di Gao、Sondes Boujnah、Annie−Claude Gaumont、Aqeel A. Hussein、Sami Lakhdar
DOI:10.1021/acs.orglett.0c02863
日期:2020.10.2
We report herein a visible-light-mediated C–H alkylation of pyridine derivatives that proceeds by simple combination of a large variety of N-alkoxypyridinium ions with alkanes in the presence of 2 mol % of fac-Ir(ppy)3 under blue illumination. The mild reaction conditions together with the high group functional tolerance make of this process a useful synthetic platform for the construction of structurally
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
A new general, simple and mild procedure is reported in this communication, based on the photochemically induced decarboxylation of carboxylic acids by iodosobenzene diacetate to obtain the substitution of bases by nucleophilic alkyl radicals.
Dearomative Photocatalytic Construction of Bridged 1,3‐Diazepanes
作者:Jamie A. Leitch、Tatiana Rogova、Fernanda Duarte、Darren J. Dixon
DOI:10.1002/anie.201914390
日期:2020.3.2
discovery programmes and natural product synthesis. Herein, we report the photocatalytic construction of 2,7-diazabicyclo[3.2.1]octanes (bridged 1,3-diazepanes) via a reductive diversion of the Minisci reaction. The fused tricyclic product is proposed to form via radical addition to the C4 position of 4-substituted quinoline substrates, with subsequent Hantzsch ester-promoted reduction to a dihydropyridine