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.