2,3-二氢吲哚,1,2,3,4-四氢喹啉和2,3,4,5-四氢苯并[ b ]氮杂可以通过代表将自由基正式环化到芳环上的方法获得。光学纯的苯并稠合的杂环也可通过该方法获得。对碘苯酚,特别是那些具有被保护为MOM醚的酚氧的对碘苯酚,可以与氨基醇偶联生成N-芳基氨基醇,可以将其转化为相应的烷基碘化物,其中的氮被保护为氨基甲酸酯。这些化合物在除去酚类保护基并在MeOH存在下用PhI(OAc)2氧化后得到交联的酮。酮经历5、6或7- exo-三角自由基环化,然后暴露于酸中,或先后用格氏试剂然后再酸进行处理,重新进行麦芽糖化处理,生成苯并稠合的氮杂环。
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
The synthesis of pipecolic acid and homopipecolic acidderivatives was developed from ω-(2-aminophenyl)-1-chloroalkyl p-tolyl sulfoxides by treatment with i-PrMgCl. An intramolecular nucleophilic substitution reaction of a magnesium carbenoid with an N-magnesio arylamine is the key step of this reaction. Proline and pipecolic acidderivatives were also synthesized from ω-(arylamino)-1-chloroalkyl p-tolyl
An experimentally simple, efficient, and inexpensive catalyst system was developed for the N-arylation of imidazole, indole, pyrrole, alkyl alcohol amines, and alkyl amines with aryl iodides and bromides. The reaction proceeds in water-ethanol media at 120 °C for 12 h with Cu2O as the catalyst, 1-(2-methylhydrazine-1-carbonyl)-isoquinoline 2-oxide (L2) as the ligand, NaOH as the base to generate a
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