Room temperature clickable coupling electron deficient amines with sterically hindered carboxylic acids for the construction of amides
作者:Jing Liu、Shi-Meng Wang、Hua-Li Qin
DOI:10.1016/j.tet.2020.131724
日期:2020.12
A method for the synthesis of difficult-to-access amides was developed through the coupling of stericallyhindered carboxylic acids and electron deficient amines via SO2F2-mediated dehydration. The method feathers with broad substrate scope, mild conditions, excellent functional group compatibility and high yields.
通过空间受阻的羧酸和缺电子的胺通过SO 2 F 2介导的脱水的偶联,开发了一种难以合成的酰胺的合成方法。该方法具有广泛的底物范围,温和的条件,优异的官能团相容性和高收率。
Palladium Catalyzed Regioselective Synthesis of Substituted Biaryl Amides through Decarbonylative Arylation of Phthalimides
作者:Partha Kumar Samanta、Papu Biswas
DOI:10.1021/acs.joc.8b03157
日期:2019.4.5
cross-coupling of N-substituted phthalimides with arylhalide provides a single step direct access of a wide range of synthetically appealing ortho-substituted biarylamides in high yields through unique carbonyl (CO) replacement. The reaction proceeds through a ligand-freecondition and is well tolerant to the diverse functionality of both imide and halide units. The reaction negates any requirement of
TBAB-Mediated Radical 5<i>-exo-trig ipso</i>
-Cyclization of 2-Arylbenzamide for the Synthesis of Spiro[cyclohexane-1,1′-isoindoline]-2,5-diene-3′,4-dione
Visible-Light-Photocatalyzed Synthesis of Phenanthridinones and Quinolinones via Direct Oxidative C–H Amidation
作者:Yonghoon Moon、Eunyoung Jang、Soyeon Choi、Sungwoo Hong
DOI:10.1021/acs.orglett.7b03600
日期:2018.1.5
A straightforward synthetic strategy to construct biologically relevant phenanthridinones and quinolinones was developed via visible-light-promoted direct oxidative C-H amidation. In this photocatalytic system, amidyl radicals can be generated by homolysis of the N-H bond of simple amide precursors via single-electron transfer under blue LED illumination, which leads to oxidative intramolecular C-H amidation. Moreover, an efficient synthetic strategy using a photocascade enabled facile assembly of quinolinone structures through a catalytic sequence involving triplet energy (E-T) transfer based E/Z olefin isomerization and subsequent photocatalytic generation of amidyl radical intermediates.