The Ni-catalyzed reaction of ortho-phenoxy-substituted aromatic amides with alkynes in the presence of LiOtBu as a base results in C–O/N–H annulation with the formation of 1(2H)-isoquinolinones. The use of a base is essential for the reaction to proceed. The reaction proceeds, even in the absence of a ligand, and under mild reaction conditions (40 °C). An electron-donating group on the aromatic ring
在 LiO t Bu 作为碱存在下, Ni 催化的邻苯氧基取代的芳族酰胺与炔烃的反应导致 C-O/N-H 环化,形成 1( 2H )-异喹啉酮。碱的使用对于反应进行是必不可少的。即使在没有配体的情况下,在温和的反应条件(40°C)下,反应也会继续进行。芳环上的给电子基团促进反应。该反应也适用于氨基甲酸酯(C-O 键活化)、甲硫基(C-S 键活化)和氰基(C-CN 键活化)作为离去基团。
Thallium in organic synthesis. 63. A convenient synthesis of aromatic nitriles
作者:Edward C. Taylor、Alan H. Katz、Alexander McKillop
DOI:10.1016/s0040-4039(01)81602-6
日期:1984.1
Aromatic nitriles are readily formed by heating arylthallium bis(trifluoroacetates) with CuCN in acetonitrile.
Detection of weak hydrogen bonding to fluoro and nitro groups in solution using H/D exchange
作者:C. R. Shugrue、J. R. DeFrancisco、A. J. Metrano、B. D. Brink、R. S. Nomoto、B. R. Linton
DOI:10.1039/c5ob02360b
日期:——
Hydrogen/deuterium (H/D) exchange can be a sensitive technique for measuring the strength of hydrogen bonding to neutral organic nitro and fluoro groups. The slower rates of reaction in comparison to suitable controls suggest that hydrogen bonding is present, albeit rather weak.
Mild Amide Synthesis Using Nitrobenzene under Neutral Conditions
作者:Ni Xiong、Yuanqi Dong、Bin Xu、Yang Li、Rong Zeng
DOI:10.1021/acs.orglett.2c01743
日期:2022.7.8
Amide synthesis is one of the most important transformations in organic chemistry due to the broad application in pharmaceutical drugs and organic materials. In this report, we describe a mild protocol for amide formation using the readily available nitroarenes as nitrogen sources and an inexpensive iron complex as a catalyst. Because of the use of the pH-neutral conditions and the avoidance of the
由于在药物和有机材料中的广泛应用,酰胺合成是有机化学中最重要的转化之一。在本报告中,我们描述了一种温和的酰胺形成方案,使用现成的硝基芳烃作为氮源和廉价的铁络合物作为催化剂。由于使用 pH 中性条件和避免强氧化剂或还原剂,可以很好地耐受各种芳香族和脂肪族醛以及具有各种官能团的硝基芳烃。在详细研究的基础上提出了一种合理的机制,其中铁催化剂引发自由基过程,溶剂作为 O 原子受体起关键作用。
Vasil'eva, I. V.; Tadevosyan, S. G.; Teleshov, E. N., Doklady Chemistry, 1981, vol. 256, p. 15 - 18
作者:Vasil'eva, I. V.、Tadevosyan, S. G.、Teleshov, E. N.、Pravednikov, A. N.