研究和评价二芳基次膦酸铋对一系列含有邻甲氧基苯基、间甲氧基苯基、间甲苯基和对甲苯基芳基的配合物的抗菌活性和细胞毒性的构效关系;[Bi( o -MeOPh) 2 (O(O)P(H)Ph)] n 1 , [Bi( o -MeOPh) 2 (O(O)PPh 2 )] n 2 , [Bi( o -MeOPh) 2 (O(O)P( p -MeOPh) 2 )] n 3 , [Bi( m -MeOPh) 2(O(O)P(H)Ph)] n 4 , [Bi( m -MeOPh) 2 (O(O)PPh 2 )] n 5 , [Bi( m -MeOPh) 2 (O(O)P( p -MeOPh) 2 )] n 6 , [Bi( m -tol) 2 (O(O)P(H)Ph)] n 7 , [Bi( m -tol) 2 (O(O)PPh 2 )] n 8 , [Bi( m -tol) 2 (O(O)P( p -MeOPh)
Copper‐Promoted N‐Arylation of the Indole Side Chain of Tryptophan Using Triarylbismuthines
作者:Adrien Le Roch、Hwai‐Chien Chan、Alexandre Gagnon
DOI:10.1002/ejoc.202000667
日期:2020.9.30
for the regioselective N‐arylation of the indole sidechain of tryptophan using triarylbismuth reagents as the arylating agent is reported. The reaction is catalyzed by copper(II) acetate in the presence of an organic base. The protocol allows the installation of electron rich or poor aryl groups with substituents at any position, shows excellent scope and functional group compatibility, and retains
Copper‐Promoted O‐Arylation of the Phenol Side Chain of Tyrosine Using Triarylbismuthines
作者:Adrien Le Roch、Martin Hébert、Alexandre Gagnon
DOI:10.1002/ejoc.202000790
日期:2020.9.7
for the O‐arylation of the sidechain of tyrosine usingtriarylbismuthreagents is reported. The reaction is performed in dichloromethane under oxygen at 50 °C in the presence of pyridine, is promoted by copper diacetate, shows excellent scope and functional group tolerance, and retains the integrity of the chiral center. The reactivity of other amino acids possessing a nucleophilic sidechain under these
The N-arylation of indoles, indazoles, pyrroles, and pyrazoles using highly functionalized trivalent arylbismuth reagents is reported. The reaction is promoted by a substoichiometric amount of copper acetate, and it tolerates a wide diversity of functional groups on the azole and the organobismuth reagent. The method is also applied to the N-arylation of tryptophan derivatives.
Preparation of 3-O-aryl chloramphenicol derivatives via chemoselective copper-catalyzed O-arylation of (1R,2R)-(−)-N-BOC-2-amino-1-(4-nitrophenyl)-1,3-propanediol using triarylbismuthines
A copper-catalyzed protocol for the chemoselective arylation of (1R,2R)-(−)-N-BOC-2-amino-1-(4-nitrophenyl)-1,3-propanediol using triarylbismuth reagents is reported. The reaction operates under simple and mild conditions, shows good functional group tolerance and allows the installation of ortho-, meta-, and para-substituted aryl groups in moderate to good yields. These arylated products are then
报道了使用三芳基铋试剂的(1 R,2 R)-(-)- N -BOC-2-氨基-1-(4-硝基苯基)-1,3-丙二醇化学选择性芳基化的铜催化方案。该反应在简单和温和的条件下进行,显示出良好的官能团耐受性,并允许以中等至良好的产率安装邻,间和对取代的芳基。然后将这些芳基化产物分两步转化为其相应的N-二氯乙酰胺衍生物。该序列提供了对3- O-芳基氯霉素衍生物的方便访问。