摘要 第一个温和、原位、单锅、高收率、筛选良好的铜 (II) 盐基催化剂体系,利用硼氢化钠的氢替代作用,在存在于已经描述了水或甲醇之类的绿色溶剂。此外,该催化体系还可以在短时间内活化各种官能团进行氢化物还原,催化剂负载量低,无需高压或分子氢供应。值得注意的是,该系统探索了替代昂贵的传统加氢方法的巨大潜力,从而在有机合成领域提供了一种更绿色、更简单的加氢策略。
Synthesis of N- aryl and N -heteroaryl hydroxylamines via partial reduction of nitroarenes with soluble nanoparticle catalysts
作者:Jefferson H. Tyler、S. Hadi Nazari、Robert H. Patterson、Venkatareddy Udumula、Stacey J. Smith、David J. Michaelis
DOI:10.1016/j.tetlet.2016.11.105
日期:2017.1
ruthenium nanoparticles enable the selective hydrazine-mediated reduction of nitroarenes to hydroxylamine products in high yield and selectivity. Key to obtaining the hydroxylamine product in good yield was the use of organic solvents capable of solubilizing the polystyrene-supported nanoparticle catalyst. N-aryl and N-heteroaryl hydroxylamines are generated under exceptionally mildconditions and in
Promoting effect of na2SeO3 on the activity of MoO3 catalyst for nitroarenes reduction to amines with sodium borohydride
作者:Kazuo Yanada、Reiko Yanada、Haruo Meguri
DOI:10.1016/s0040-4039(00)91647-2
日期:1992.3
Sodium selenite enhances the catalytic activity of molybdenum(VI) oxide during the reduction of nitroarenes (XC6H4NO2, X = 4-CN, 4-CO2Et, H, 4-C1, 2-Me, 3-Me, 4-Me, 4-OMe) with sodium borohydride to arenamines (86–98 % yields) under mild conditions.
亚硒酸钠可增强硝基芳烃(XC 6 H 4 NO 2,X = 4-CN,4-CO 2 Et,H,4-C1,2-Me,3-Me ,4-Me,4-OMe)和硼氢化钠在温和的条件下转化为芳胺(86-98%的收率)。
A novel strategy for the preparation of arylhydroxylamines: chemoselective reduction of aromatic nitro compounds using bakers' yeast
作者:Feng Li、Jingnan Cui、Xuhong Qian、Rong Zhang
DOI:10.1039/b408566c
日期:——
Usingbakers' yeast as a biocatalyst, the chemoselective reduction of aromatic nitro compounds bearing electron-withdrawing groups gave the corresponding hydroxylamines with good to excellent conversion under mild conditions.
Pd-Catalyzed Silicon Hydride Reductions of Aromatic and Aliphatic Nitro Groups
作者:Ronald J. Rahaim、Robert E. Maleczka
DOI:10.1021/ol052120n
日期:2005.10.1
[reaction: see text] Room-temperature reduction of aromaticnitrogroups to amines can be accomplished in high yield, with wide functional group tolerance and short reaction times (30 min) using a combination of palladium(II) acetate, aqueous potassium fluoride, and polymethylhydrosiloxane (PMHS). Replacing PMHS/KF with triethylsilane allows aliphatic nitrogroups to be reduced to their hydroxylamines.
Mechanistic studies on intramolecular C–H trifluoromethoxylation of (hetero)arenes via OCF<sub>3</sub>-migration
作者:Katarzyna N. Lee、Zhen Lei、Cristian A. Morales-Rivera、Peng Liu、Ming-Yu Ngai
DOI:10.1039/c6ob00132g
日期:——
operationally simple approach to access a wide range of unprecedented and valuable OCF3-containing buildingblocks. Herein we describe our investigations to elucidate its reaction mechanism. Experimental data indicate that the O-trifluoromethylation of N-(hetero)aryl-N-hydroxylamine derivatives is a radical process, whereas the OCF3-migration step proceeds via a heterolytic cleavage of the N–OCF3 bond followed