Ligand-Enabled Pd(II)-Catalyzed Bromination and Iodination of C(sp<sup>3</sup>)–H Bonds
作者:Ru-Yi Zhu、Tyler G. Saint-Denis、Ying Shao、Jian He、Joshua D. Sieber、Chris H. Senanayake、Jin-Quan Yu
DOI:10.1021/jacs.7b02196
日期:2017.4.26
α-hydrogen-containing carboxylicacid and amino acid-derived amides. These reactions are exclusively enabled by quinoline-type ligands. The halogenated products obtained in this reaction are highly versatile and rapidly undergo further diversification. Further, we report the first example of a freecarboxylic acid-directed Pd(II)-catalyzed C(sp3)-H bromination, enabled by quinoline ligands.
我们在此报告了钯 (II) 催化的各种含 α-氢羧酸和氨基酸衍生酰胺的溴化和碘化。这些反应完全由喹啉型配体实现。在该反应中获得的卤化产物用途广泛,并迅速进一步多样化。此外,我们报告了由喹啉配体实现的游离羧酸引导的 Pd(II) 催化的 C(sp3)-H 溴化的第一个例子。
Multicomponent Strategy to Indeno[2,1-<i>c</i>]pyridine and Hydroisoquinoline Derivatives through Cleavage of Carbon–Carbon Bond
作者:Xian Feng、Jian-Jun Wang、Zhan Xun、Zhi-Bin Huang、Da-Qing Shi
DOI:10.1021/jo5025199
日期:2015.1.16
A concise and efficient three-component domino reaction has been developed for the synthesis of polyfunctionalized indenopyridine and hydroisoquinoline derivatives via the cleavage of a C–C bond under transition-metal-free conditions. This reaction provides facile access to complex nitrogen-containing heterocycles by simply mixing three common starting materials in EtOH in the presence of 20 mol %
Access to α-Hydroxy Amides via a Practical Metal-Free “One-Pot” Tandem Reaction Involving Aerobic C(sp<sup>3</sup>)–H Hydroxylation and C(sp<sup>2</sup>)–C(sp<sup>3</sup>) Cleavage
作者:Xiao Zhang、Yang Yu、Wenjie Li、Lei Shi、Hao Li
DOI:10.1021/acs.joc.2c01839
日期:2022.12.16
A flexible metal-free cascade reactioninvolving aerobic C(sp3)–H hydroxylation and decarbonylation with high regioselectivity and functional group tolerance has been established. Moreover, this indirect hydroxylation approach of N-aryl amides could enable the construction of a wide range of valuable secondary alcohols at α-position of N-aryl amides. It provides a supplementary strategy for direct
A Lewis acid-catalyzed tandem reaction enabling 2-arylglycerol derivative as versatile 1,3-biselectrophiles for the synthesis of 4H-chromenes and 2-pyridinones
Acid-catalyzed tandem reactions were established by employing a novel class of 2-arylglycerol derivative, 5-aryl-1,3-dioxan-5-ol, as versatile 1,3-biselectrophile. In the reactions, 5-aryl-1,3-dioxan-5-ol works like atropaldehydes or 2-aryl malondialdehydes, and can react with 2-naphthols and β-keto amides, allowing the synthesis of 4H-chromenes and 5-aryl-2-pyridinones. High yields, good functional
A simple and atom-economical one-step protocol is described for the synthesis of biologically valuable 3-isoquinuclidones. The method proceeds from the simple starting materials, α-acyl N-arylcinnamamides, and can be performed under mild conditions in the presence of tBuOK. The key steps of this process are the double Michael addition reaction of a Nazarov-like reagent and the subsequent intramolecular