sphinomethyl)cyclopentane as a catalyst, a range of aryl bromides and chlorides undergoes Suzuki cross-coupling with alkylboronic acids in good yields. Several alkyl substituents such as ethyl, n-butyl, n-octyl, isobutyl or 2,2-dimethylpropyl on the alkylboronic acids have been successfully used. The functional group tolerance on the arylhalide is remarkable; substituents such as fluoro, methyl, methoxy
通过使用[PdCl(C 3 H 5)] 2 /顺式,顺式,顺式-1,2,3,4-四(二苯基膦甲基)环戊烷作为催化剂,一系列芳基溴化物和氯化物进行铃木交叉偶联与烷基硼酸的收率很好。几个烷基取代基,例如乙基,正丁基,n已经成功地使用了烷基硼酸上的-辛基,异丁基或2,2-二甲基丙基。芳基卤对官能团的耐受性显着;可以容忍诸如氟,甲基,甲氧基,乙酰基,甲酰基,苯甲酰基,硝基或腈之类的取代基。此外,该催化剂即使在位阻芳基溴的反应中也可以低负荷使用。
Iron-Catalyzed Grignard Cross-Coupling with Alkyl Halides Possessing β-Hydrogens
作者:Takashi Nagano、Tamio Hayashi
DOI:10.1021/ol049779y
日期:2004.4.1
Tris(acetylacetonato)iron(III) (Fe(acac)(3)) was found to be an efficient catalyst for the cross-couplingreaction between aryl Grignardreagents and alkylhalides possessing beta-hydrogens. The reaction is applicable to secondaryalkylhalides as well as primary ones. [reaction: see text]
Unlocking the Friedel-Crafts arylation of primary aliphatic alcohols and epoxides driven by hexafluoroisopropanol
作者:Shaofei Zhang、Marie Vayer、Florent Noël、Vuk D. Vuković、Andrei Golushko、Nazanin Rezajooei、Christopher N. Rowley、David Lebœuf、Joseph Moran
DOI:10.1016/j.chempr.2021.10.023
日期:2021.12
(HFIP) as a solvent. Electron-poor aromatic epoxides and aliphatic epoxides undergo stereospecific arylation to give an alcohol which, depending on the reaction conditions, can partake in a second nucleophilic substitution with a different arene in one pot. Phenyl ethanols react through a phenonium intermediate, whereas simple aliphaticalcohols participate in a rare intermolecular SN2 Friedel-Crafts
TMEDA in Iron-Catalyzed Kumada Coupling: Amine Adduct versus Homoleptic “ate” Complex Formation
作者:Robin B. Bedford、Peter B. Brenner、Emma Carter、Paul M. Cogswell、Mairi F. Haddow、Jeremy N. Harvey、Damien M. Murphy、Joshua Nunn、Christopher H. Woodall
DOI:10.1002/anie.201308395
日期:2014.2.10
iamine (TMEDA) under catalytically relevant conditions tend to yield the homoleptic “ate” complex [Fe(mes)3]− (mes=mesityl) rather than adducts of the diamine, and it is this atecomplex that accounts for the catalytic activity. Both [Fe(mes)3]− and the related complex [Fe(Bn)3]− (Bn=benzyl) react faster with representative electrophiles than the equivalent neutral [FeR2(TMEDA)] complexes. FeI species