Zirconium metal–organic frameworks based foam materials have been successfully fabricated and applied in microplastic removal with high efficiency.

Swapped: Commercially available quinolinone derivatives (1 or 2, see scheme) were reacted with arylboronic acids in the presence of a RhI complex to give aryl(quinolin-8-yl)methanone products 3 medium good yields. A mechanism that involves situ oxidation RhIII by O2 CuI was proposed.

A pyrene-tagged ruthenium carbene 8 was synthesized and immobilized on single-walled carbon nanotubes (SWNTs) via pi-pi stacking. These interactions were greatly affected by the reaction temperature solvent polarity, thus, offering a new reversible immobilization model that can be controlled in polar solvents, such as acetone. SWNTs-supported is robust recyclable catalyst system. Six to seven cycles achieved for ring-closing metathesis of selected substrates. Importantly, after complete loss...

A new rhodium-catalyzed decarbonylated coupling reaction of ethyl benzo[h]quinoline-10-carboxylate and organoboron compounds that occurs through chelation-assisted sp2 C–COOEt bond activation was described. In this system CuCl played a very important role, five-membered rhodacycle also involved as key intermediate. Various functionalities were compatible in the reaction, desired products obtained good to excellent yields. DFT calculations on mechanisms using Rh(I) model catalyst have been...

A series of new Pd(II) complexes with simple structures were designed and synthesized for Suzuki–Miyaura coupling reactions aryl chlorides. The contain bidentate amine ligands, their characterized by single-crystal X-ray diffraction. They are highly efficient chlorides low catalyst loadings (0.01 mol %) in aqueous media at room temperature. Two possible reaction pathways involving a PdII/0/II PdII/IV/II catalytic cycle proposed, the mechanism was further investigated using density functional...

A convenient method is proposed for the synthesis of isoquinolone derivatives from 2-methylaryl aldehydes and nitriles through LiN(SiMe3)2/KOtBu-promoted formal [4 + 2] cycloaddition reaction, featuring high atomic economy, good functional group tolerance, easy operation. It enables efficient formation new C-C C-N bonds toward isoquinolones without using preactivated amides.

Abstract A ferrocene‐tagged ruthenium carbene 15 that can be reversibly immobilized in an ionic liquid (IL) via the controlled oxidation and reduction of a ferrocene tag was prepared. This offers new strategy which uses redox chemistry to control immobilization recycle both catalyst IL. In this experiment, 11 recycles were performed for ring‐closing metathesis (RCM) substrate using 16 as (IL). More importantly, after reaction completed, easily separated from supporting IL by just adding...

A homogeneous ruthenium–carbene complex was tagged with a light-responding nitrobenzospiropyran group to control its solubility through reversible conversion between neutral (lipophilic) and ionic (lipophobic) states using light irradiation (see scheme; Mes=mesityl). This has significant catalytic activity in ring-closing metathesis reactions recycled several times.

Alkaline-metal-promoted divergent syntheses of 1-aminoisoquinolines and isoquinolines have been reported involving 2-methylaryl aldehydes, nitriles, LiN(SiMe3)2 as reactants. In addition, the three-component reaction has developed to furnish 1-aminoisoquinolines. This protocol features readily available starting materials, excellent chemoselectivity, broad substrate scope, satisfactory yields.

Abstract A [{RhCl(cod)} 2 ]/CCl 3 COOH system was developed for the oxidative coupling of non‐chelate‐assisted arenes with olefins in presence catalytic amounts Cu(OAc) ⋅ H O as a co‐oxidant and oxygen terminal oxidant. The acid an indispensable component this played very important role reaction. This applied to direct series corresponding products were afforded high yields special chemo‐ regioselectivity. reaction provides atom‐efficient route vinylarenes, which are widely used various fine...

Efficient rhodium-catalyzed oxidative decarboxylation annulation reactions between mandelic acids and alkyne derivatives are described. The desired indenone products were obtained in medium to good yields under the optimized reaction conditions, which a [RhCp*Cl2]2 catalyst (10.0 mol %) combination with PCy3 ligand AgSbF6 (10 Cu(OAc)2 (20 additives. Many functional groups compatible conditions. This strategy provides promising method for construction of indenones from cheap commercially...

Herein, we report the development of a general ring expansion strategy that involves formal self-dimerization benzocyclobutenones (BCBs) through nickel catalysis. These self-dimerizations BCBs are efficient and scalable provide facile unique construction diverse seven-membered ketones 1H-isochromen-1-ones with high structural diversity. Moreover, solvent effects CO atmosphere play crucial role in promoting exclusion, which may address regioselectivity control toward (4 + 4 - 1) product,...

Ruthenium carbene complexes 9 with a closo-1,2-C(2)B(10)H(11) tag and 10 an ionic [nido-7,8-C(2)B(9)H(11)](-) were synthesized. Both are highly reactive catalysts for olefin metathesis reactions. Importantly, is robust recyclable anion-appended catalyst that was suitable noncovalent binding many cationic resins. At least ten recycles achieved RCM of the selected substrate using as in liquids.

A rhodium-catalyzed [6 + 2] cycloaddition of internal alkynes with cycloheptatriene is described. series substituted were cycloadded to through a addition give variety bicyclic compounds in excellent yields. The optimal catalytic system for these transformations was [Rh(COD)Cl]2 (5.0 mol %) catalyst combination CuI (10 and PPh3 %). proposed mechanism this includes an initial oxidative coupling reaction between the coordinated alkyne, followed by [1,3]-shift Rh metal center reductive...

A new method for building aryl ketones containing heterocyclic rings through chelation-assisted C-O bond activation catalyzed by a rhodium complex has been developed. In this reaction, methyl quinoline-8-carboxylate, quinoxaline-5-carboxylate, and their derivatives were reacted with an excess amount of substituted phenyl boronic acid in the presence rhodium(I) to give phenyl(quinolin-8-yl)methanone, phenylquinoxalin-5-ylmethanone, medium high yields. The current offers highly favorable...

A series of aryl-substituted pyrrole derivatives was synthesized from diallylamines through a ruthenium carbene catalyzed ring-closing metathesis reaction and in situ oxidative dehydrogenation by FeCl3·6H2O or CuCl2·2H2O the presence O2. The mild, simple, convenient. An oxygen atmosphere played critical role obtaining high conversion substituted pyrroles proposed catalytic system.

A highly efficient one-pot procedure for the preparation of substituted quinolines from o-nitrotoluenes with electron-withdrawing groups and olefins (acrylic esters acrylonitriles) using a cesium catalyst has been developed. plausible [2+4] cycloaddition mechanism is proposed. This method uses nitroaromatic compounds as starting materials to give quinoline derivatives in good high yields under mild conditions no transition metal catalysis. It provides an atom economical pathway synthesis...

Abstract A cationic ruthenium carbyne complex was prepared and found to initiate olefin metathesis reactions with good activities, which throws a new light on the design of type catalyst for RCM reactions. More importantly, no double bond isomerized by‐product observed even at elevated temperatures in catalyzed by complex. mechanism involving situ conversion carbene via addition an iodide carbon also proposed.

A one-step preparation method for indenone and quinone derivatives <italic>via</italic> rhodium-mediated [5 + 2 − 2] 1] decarbonylative cycloadditions of 1<italic>H</italic>-indene-1,2,3-triones alkynes has been achieved.

Ligand-controlled nickel-catalyzed selective cleavage of the C1–C2 or C1–C8 bond benzocyclobutenones (BCBs) is reported. The delicate selection dpppe PMe3 as ligand led to predictably divergent synthesis a wide range 1-naphthols and 2-naphthols without C2 C3 substituents, respectively, from BCBs potassium alkynyltrifluoroborate, increase in amount resulted tandem reaction 2 equiv BCB with borate afford 3,4,5-trisubstituted 2-naphthols. fabulous effect facile unique construction...