Ni-Catalyzed direct 1,4-difunctionalization of [60]fullerene with benzyl bromides
作者:Weili Si、Xuan Zhang、Naoki Asao、Yoshinori Yamamoto、Tienan Jin
DOI:10.1039/c5cc01534k
日期:——
A new Ni-catalyzed direct 1,4-difunctionalization of [60]fullerene with various benzyl bromides has been developed. The use of a DMSO additive combined with a nickel catalyst is indispensable for the formation of 1,4-dibenzyl fullerenes with a variety of functional groups. The reaction proceeds through the formation of a fullerene monoradical species.
Reaction of C<sub>60</sub><sup>2−</sup> with Organic Halides Revisited in DMF: Proton Transfer from Water to RC<sub>60</sub><sup>−</sup> and Unexpected Formation of 1,2-Dihydro[60]fullerenes
作者:Wei-Wei Yang、Zong-Jun Li、Xiang Gao
DOI:10.1021/jo100430a
日期:2010.6.18
The reactions of dianionic C60 with organic halides, which have been studied extensively in benzonitrile (PhCN), are revisited in a different solvent medium, N,N-dimethylformamide (DMF), by using ArCH2Br (Ar = Ph, C6H4CH3, C6H4Br). Interestingly, instead of the 1,4-R2C60 adducts, which are the typical products when the reactions are carried out in PhCN, the 1,2-dihydro[60]fullerenes (1,2-HRC60) have
通过使用ArCH 2 Br(Ar = Ph,C 6),在不同的溶剂介质N,N-二甲基甲酰胺(DMF)中重新考察了在苯甲腈(PhCN)中已广泛研究的双阴离子C 60与有机卤化物的反应。H 4 CH 3,C 6 H 4 Br)。有趣的是,代替了在PhCN中进行反应时的典型产物1,4-R 2 C 60加合物,获得了1,2-二氢[60]富勒烯(1,2-HRC 60)。作为DMF的主要产品,但邻位-CH 3 C除外6 H 4 CH 2 Br可能是由于空间效应。所获得的1,2-二氢[60]富勒烯已通过单晶衍射,1 H和13 C NMR,高分辨率质谱(HRMS)和UV-vis进行了表征。用氘代试剂包括PhCD 2 Br,DMF- d 7和D 2进行进一步检查O已经表明1,2-二氢富勒烯的富勒烯基氢起源于DMF中的痕量水残留物。当在PhCN中通过添加过量的水重新检查反应时,1,2-二氢富勒烯的收率显着增加
Regioselective synthesis of [60]fullerene η<sup>5</sup>-indenide R<sub>3</sub>C<sub>60</sub><sup>−</sup>and η<sup>5</sup>-cyclopentadienide R<sub>5</sub>C<sub>60</sub><sup>−</sup>bearing different R groups
Treatment of a 1,7-diorgano[60]fullerene with Grignard reagents or organocopperreagents affords a [60]fullerene indenide or a [60]fullerene cyclopentadienide regioselectively in good to excellent yields. These reactions gave an insight into the reaction mechanism of the organocopper penta-addition reaction of [60]fullerene, giving [60]fullerene cyclopentadienide in quantitative yield.
Stepwise Synthesis of Fullerene Cyclopentadienide R<sub>5</sub>C<sub>60</sub><sup>-</sup> and Indenide R<sub>3</sub>C<sub>60</sub><sup>-</sup>. An Approach to Fully Unsymmetrically Substituted Derivatives
Fullerene cyclopentadienide (PhCH(2))(2)Ph(3)C(60)(-) and indenide (PhCH(2))(2)PhC(60)(-), each bearing two different organic groups, were efficiently synthesized through regioselective reactions of 1,4-(PhCH(2))(2)C(60) with an organocopper reagent (PhMgBr/CuBr.SMe(2)) or a Grignard reagent (PhMgBr) followed by deprotonation with KO(t)()Bu.
Reactions of [60]Fullerene with Acetone under Basic Condition: Nucleophilic Ring Opening of the [5,6]-Cyclopropane in C<sub>60</sub> and Formation of the Substituted Methano[60]Fulleroids
The reactions of C60 with acetone were carried out under basic condition in the presence of 1.0 M TBAOH (tetra-n-butylammonium hydroxide) methanol solution and ArCH2Br (Ar = Ph or o-BrPh), where methano[60]fulleroids with a novel 1,1,4,9,9,25-configuration were obtained and structurally characterized by single crystal diffraction. The product was formed via the ring-opening reaction of the [5,6]-cyclopropane
C 60与丙酮的反应是在碱性条件下,在1.0 M TBAOH(氢氧化四正丁基铵)甲醇溶液和ArCH 2 Br(Ar = Ph或o -BrPh)存在下进行的,其中甲烷[60]富勒烯获得具有新颖的1,1,4,9,9,25构型并通过单晶衍射对其结构进行表征。经由亲核加成的MeO的[5,6] -环丙烷的开环反应所形成的产物- ,这是从其它酮的反应不同以前的报告。