我们在这里报告了钌催化的带有两个邻位碳-杂原子(O或N)键的芳族酮的选择性单芳基化。在由RuHCl(CO)(P i Pr 3)2,CsF和苯乙烯组成的新开发的催化剂体系下,2',6'-二甲氧基苯乙酮与苯基硼酸酯的C–O芳基化选择性地产生了C–O单芳基化产物。选择性C–O单芳基化反应适用于各种芳基硼酸酯和芳族酮,并具有较高的区域选择性和化学选择性。使用芳族酯的C–O单芳基化作为关键步骤,也可以实现正式的交替烯醇合成。
Sequential Reaction of Arynes via Insertion into the π-Bond of Amides and Trapping Reaction with Dialkylzincs
作者:Eito Yoshioka、Shigeru Kohtani、Hideto Miyabe
DOI:10.1021/ol100387h
日期:2010.5.7
The sequential transformation of arynes into ortho-disubstituted arenes is achieved by a one-pot procedure using formamides and dialkylzincs. This reaction proceeded via a route involving the trapping reaction of the formal [2 + 2] cycloaddition adducts or quinone methides generated by the insertion of arynes into the C═Obond of amides.
Insertion of arynes into the carbon–oxygen double bond of amides and its application into the sequential reactions
作者:Eito Yoshioka、Hideto Miyabe
DOI:10.1016/j.tet.2011.10.072
日期:2012.1
The reaction of arynes, generated from ortho-(trimethylsilyl)aryl triflates, with the C=O bond of formamides gave salicylaldehyde derivatives via the formation of formal [2+2] adducts. The sequential transformation of arynes into ortho-disubstituted arenes, o-aminoalkylphenols or o-hydroxyalkylphenols, was achieved by one-pot procedure using dialkylzincs. (C) 2011 Elsevier Ltd. All rights reserved.
Selective Monoarylation of Aromatic Ketones and Esters via Cleavage of Aromatic Carbon–Heteroatom Bonds by Trialkylphosphine Ruthenium Catalysts
作者:Hikaru Kondo、Takuya Kochi、Fumitoshi Kakiuchi
DOI:10.1021/acs.orglett.6b03761
日期:2017.2.17
We report here the ruthenium-catalyzed selective monoarylation of aromatic ketones bearing two ortho carbon–heteroatom (O or N) bonds. Under the newly developed catalyst system consisting of RuHCl(CO)(PiPr3)2, CsF, and styrene, the C–O arylation of 2′,6′-dimethoxyacetophenone with a phenylboronate gave the C–O monoarylation product selectively. The selective C–O monoarylation was applicable to a variety
我们在这里报告了钌催化的带有两个邻位碳-杂原子(O或N)键的芳族酮的选择性单芳基化。在由RuHCl(CO)(P i Pr 3)2,CsF和苯乙烯组成的新开发的催化剂体系下,2',6'-二甲氧基苯乙酮与苯基硼酸酯的C–O芳基化选择性地产生了C–O单芳基化产物。选择性C–O单芳基化反应适用于各种芳基硼酸酯和芳族酮,并具有较高的区域选择性和化学选择性。使用芳族酯的C–O单芳基化作为关键步骤,也可以实现正式的交替烯醇合成。
Ruthenium-Catalyzed Monoalkenylation of Aromatic Ketones by Cleavage of Carbon-Heteroatom Bonds with Unconventional Chemoselectivity
Ruthenium‐catalyzed selective monoalkenylation of ortho CO or CN bonds of aromatic ketones was achieved. The reaction allowed the direct comparison of the relative reactivities of the cleavage of different carbon‐heteroatom bonds, thus suggesting an unconventional chemoselectivity, where smaller, more‐electron‐donating groups are more easily cleaved. Selective monofunctionalization of CO bonds in