Ir(III)-Catalyzed Direct C–H Functionalization of Arylphosphine Oxides: A Strategy for MOP-Type Ligands Synthesis
作者:Zhong Liu、Ji-Qiang Wu、Shang-Dong Yang
DOI:10.1021/acs.orglett.7b02710
日期:2017.10.6
efficiently applied to Ir(III)-catalyzed direct C–H functionalization of arylphosphine oxides. Involving C–H activation, carbene insertion, and tautomerism, this reaction proceeds under mild conditions, thus proving an approach to the synthesis of MOP-type ligand precursor in a single step. The utility of this transformation has been further demonstrated in ligand synthesis as well as in the construction
Rh(<scp>iii</scp>)-Catalyzed straightforward arylation of 8-methyl/formylquinolines using diazo compounds
作者:Bidhan Ghosh、Rajarshi Samanta
DOI:10.1039/c9cc02391g
日期:——
A straightforward Rh(III)-catalyzed general strategy was developed for the introduction of naphthol/phenol moieties to the C(sp3)–H bond of 8-methylquinoline using diazonaphthalen-2(1H)-ones/quinone diazides. The developed method was further extended towards the arylation of 8-formylquinolines to accomplish diarylketone derivatives. The method is simple, relatively rapid, and chemo and regioselective
Rh(II)-Catalyzed Synthetic Strategy for Diverse and Functionalized Halonaphthalenyl Ethers and Esters from Diazo Compounds and Its Application to Polyaromatic Compounds
作者:Yong Lee、Ek Baral、Sung Kim、Young-Jung Wee
DOI:10.1055/s-0035-1561295
日期:——
various functionalized halonaphthalenyl ethers and esters in moderate to good yield was achieved via rhodium(II)-catalyzed reaction of readily available diazo compounds with benzyl halides or acid halides. This methodology has several advantages, such as ease of handling, mild reaction conditions, bromine- or chlorine-free route, and the use of an effective catalyst. The synthesized compounds were further
A Rh(II)-catalyzed formal [3+3] cyclization of diazonaphthoquinones and propargyl alcohol is reported to afford 2,3-dihydro-1,4-benzodioxins. Various terminal propargyl alcohols react with diazonapthoquinone in the presence of Rh2(OAc)4 to give the corresponding dihydrodioxins in good to high yields. However, dihydrodioxins are not formed in the reaction of internal propargyl alcohols, and the O–H
An enantioselective C−H arylation of phosphine oxides with o‐quinone diazides catalyzed by an iridium(III) complex bearing an atropchiral cyclopentadienyl (Cpx) ligand and phthaloyl tert‐leucine as co‐catalyst is reported. The method allows access to a) P‐chiral biaryl phosphine oxides, b) atropo‐enantioselective construction of sterically demanding biaryl backbones, and also c) selective assembly