An effective method for alkoxycarbonylation of (hetero)aryl bromides is developed in the presence of in situ-generated phosphinite ligands tBu2POR (R = nBu, nPr, Et or Me). For this purpose commercially available tBu2PCl was used as the pre-ligand in the presence of different alcohols. For the first time cross coupling reactions with two alcohols – one generating the ligand, the other used as substrate
在原位生成的次膦酸酯配体t Bu 2 POR(R = n Bu,n Pr,Et或Me)存在下,开发了一种用于(杂)芳基溴的烷氧羰基化的有效方法。为此目的,在不同醇存在下,将可商购的t Bu 2 PC1用作预配体。首次开发了与两种醇的交叉偶联反应-一种生成配体,另一种用作底物。通过这种方法,可以以更有效的方式进行配体优化,并且可以以良好的产率和选择性获得所需的产物。
RuH2(CO)(PPh3)3-catalyzed arylation of aromatic esters using arylboronates via C–H bond cleavages
The RuH2(CO)(PPh3)3-catalyzed C–H functionalization of aromatic esters with 5,5-dimethyl-2-aryl-[1,3,2]dioxaborinanes (arylboronates) gave the orthoarylation products. This coupling reaction can be performed with various combinations of isopropyl benzoate derivatives and arylboronates. Introduction of CF3 group in the aromatic ring increased the reactivity of the esters. Pinacolone effectively served
RuH 2(CO)(PPh 3)3催化的芳香族酯与5,5-二甲基-2-芳基-[1,3,2]二氧杂硼烷酮(芳基硼酸酯)的C–H官能化反应得到邻芳基化产物。该偶联反应可以用异丙基苯甲酸酯衍生物和芳基硼酸酯的各种组合进行。在芳环中引入CF 3基团增加了酯的反应性。Pinacolone有效地充当了由C–H键断裂产生的氢化物的接受体,并且使用的pinacolone的量也影响了芳基化产物的收率。
[EN] ALLOSTERIC BINDING COMPOUNDS<br/>[FR] COMPOSÉS DE LIAISON ALLOSTÉRIQUES
申请人:UNIV AARHUS
公开号:WO2010094289A1
公开(公告)日:2010-08-26
The present invention relates to allosteric binding compounds of formula (I), especially for the treatment of CNS disorders, together with pharmaceutical compositions and methods of treatment including these compounds.
Decarbonylative Methylation of Aromatic Esters by a Nickel Catalyst
作者:Toshimasa Okita、Kei Muto、Junichiro Yamaguchi
DOI:10.1021/acs.orglett.8b01233
日期:2018.5.18
A Ni-catalyzed decarbonylative methylation of aromatic esters was achieved using methylaluminums as methylating agents. Dimethylaluminum chlorides uniquely worked as the methyl source. Because of the Lewis acidity of aluminum reagents, less reactive alkyl esters could also undergo the present methylation. By controlling the Lewis acidity of aluminum reagents, a chemoselective decarbonylative cross-coupling
The present invention relates to allosteric binding compounds of formula (I), especially for the treatment of CNS disorders, together with pharmaceutical compositions and methods of treatment including these compounds.