An efficient and atom-economical route to <i>N</i>-aryl amino alcohols from primary amines
作者:Zhen Xiao、Juanjuan Li、Qiang Yue、Qian Zhang、Dong Li
DOI:10.1039/c8ra07355d
日期:——
In this paper we reported a novel method for generation of N-aryl amino alcohols from N,N-disubstituted picolinamides through reduction/ring-opening reaction with NaBH4. The N,N-disubstituted picolinamides can be easily obtained from primary amines after convenient condensation with picolinic acid and coupling with cyclic ethers. The whole route proceeded under simple and mild conditions with high
Rhodium(III)-Catalyzed<i>N</i>-Nitroso-Directed CH Addition to Ethyl 2-Oxoacetate for Cycloaddition/Fragmentation Synthesis of Indazoles
作者:Jinsen Chen、Pei Chen、Chao Song、Jin Zhu
DOI:10.1002/chem.201404506
日期:2014.10.27
RhIII‐catalyzed N‐nitroso‐directed CH addition to ethyl 2‐oxoacetate allows subsequent construction of indazoles, a privileged heterocycle scaffold in synthetic chemistry, through the exploitation of reactivity between the directing group and installed group. The formal [2+2] cycloaddition/fragmentation reaction pathway identified herein, a unique reactivity pattern hitherto elusive for the N‐nitroso
An iron(0)-catalysed cascade synthesis of N-alkylated anilines from allylic or homoallylic alcohols and primary and secondary anilines under hydrosilylation conditions has been developed. Notably, a simple Fe(cod)(CO)3 complex (cod = cycloocta-1,5-diene) was used as a precatalyst under visible light activation in ethanol in the presence of the inexpensive and non-toxic PMHS (polymethylhydrosiloxane) as the hydrosilane source. This methodology is based on a three step-one sequence process involving isomerisation of allylic alcohols/condensation with anilines/reduction reactions.
Formation of 4-<i>N</i>-Arylamino-1-butanol Derivatives from Aromatic Nitro Compounds via a Novel Palladium-Catalyzed Tetrahydrofuran Ring-Opening Reaction
作者:Brian W. Moran、Peter T. M. Kenny
DOI:10.1080/00397911.2011.582978
日期:2012.12.1
Abstract 4-N-Arylamino-1-butanol derivatives are produced via a palladium-catalyzed tetrahydrofuran ring-opening reaction. This reaction occurs during the reduction of aromatic nitro groups with polymethylhydrosiloxane (PMHS) and potassium fluoride in the presence of hydrogen peroxide. This represents a novel route for the synthesis of 4-N-arylamino-1-butanols. GRAPHICAL ABSTRACT
N- versus O-Arylation of Aminoalcohols: Orthogonal Selectivity in Copper-Based Catalysts
作者:Alexandr Shafir、Phillip A. Lichtor、Stephen L. Buchwald
DOI:10.1021/ja068926f
日期:2007.3.1
Two complementary protocols for copper-catalyzed arylation of aminoalcohols were developed. Selective N-arylation was accomplished at room temperature using 2-isobutyrylcyclohexanone (a beta-diketone) as supporting ligand, while selective O-arylation required the use of 3,4,7,8-tetramethylphenanthroline at 80-110 degrees C. Systematic examination of the reaction scope revealed that high levels of selectivity are achieved for a variety of substrates, provided that nonchelating (or weakly chelating) aminoalcohols are used. The generality of the method was highlighted by the synthesis, in a pairwise fashion, of a number of functionalized N- and O-arylated aminoalcohols.