Iron-Catalyzed <i>Ortho</i> C–H Methylation of Aromatics Bearing a Simple Carbonyl Group with Methylaluminum and Tridentate Phosphine Ligand
作者:Rui Shang、Laurean Ilies、Eiichi Nakamura
DOI:10.1021/jacs.6b06908
日期:2016.8.17
(Me2N-TP), that allows us to convert an ortho C-H bond to a C-CH3 bond in aromatics and heteroaromatics bearing simple carbonyl groups under mild oxidative conditions. The reaction is powerful enough to methylate all four ortho C-H bonds in benzophenone. The reaction tolerates a variety of functionalgroups, such as boronic ester, halide, sulfide, heterocycles, and enolizable ketones.
o-quinodimethanes (6) in solution. The zero-field splitting parameters, D and E, were measured in matrices of different viscosities and are analyzed in terms of a sigma-dot (σ•) scale of spin-delocalizationsubstituentconstants. Fairly good correlation with σ• was found for the D values of 32 in its minimum energy geometry. Stabilities of 32 were estimated either by measuring the temperature at which
已经制备了一系列带有八个对称对位二取代基的重氮双 (2,6-二甲基苯基) 甲烷 (1) 并光解生成相应的卡宾 (2)。产品分析研究表明,卡宾 (2) 主要通过二聚作用形成四 (芳基) 乙烯 (3) 或通过攻击邻甲基而通过邻醌二甲烷分解得到 1,2-二氢苯并环丁烯 (4)( 6) 在溶液中。零场分裂参数 D 和 E 在不同粘度的矩阵中测量,并根据自旋离域取代基常数的西格玛点 (σ•) 尺度进行分析。对于 32 的最小能量几何中的 D 值,发现与 σ• 具有相当好的相关性。通过测量解冻基质时三线态卡宾信号消失的温度或通过分析 32 在室温下脱气溶液中的衰变动力学来估计 32 的稳定性。它们根据低温下矩阵中的 D 值和术语进行检查。
Nauta; Ernsting; Faber, Recueil des Travaux Chimiques des Pays-Bas, 1941, vol. 60, p. 915,927
作者:Nauta、Ernsting、Faber
DOI:——
日期:——
Faber; Nauta, Recueil des Travaux Chimiques des Pays-Bas, 1943, vol. 62, p. 469,482
作者:Faber、Nauta
DOI:——
日期:——
Insertion of carbon monoxide into carbon-lithium bonds. A convenient one-step synthesis of 1,2-diketone diaryl derivatives