Synthesis and Application of Double Perovskite Bi1.97Eu0.03MoO6 as Heterogeneous and Recyclable Nanocatalyst for Quinoline Synthesis

An efficient and economical protocol for the synthesis of substituted quinolines from various 2-amino aryl ketones and aliphatic ketones in presence of a catalytic quantity of double perovskite Bi1.97Eu0.03MoO6 catalyst, water at ambient temperature to generate the respective quinolines in good yields. The accompanied catalyst had high activity and stability and it might be utilized at least a few times without losing its effectiveness.

Preparation of hexafluoroisopropyl esters by oxidative esterification of aldehydes using sodium persulfate

A metal-free route for oxidative esterification of aldehydes using sodium persulfate and a catalytic quantity of a nitroxide.

Supported Ruthenium and Tetrapropylammonium Bromide Catalysts for Oxidative Carboxylation of 1-Decene

Cyclic carbonate compounds are valuable for a range of applications and can be synthesized by a one-pot reaction involving epoxidation of olefin followed by reaction of the epoxide with CO2. This study used supported ruthenium catalysts for the epoxidation step (first step), where a combination of tetrapropylammonium bromide and zinc bromide was used for the cycloaddition of carbon dioxide. The supported ruthenium catalyst, prepared by a sol-immobilization method, allowed the effective epoxidation of 1-decene in air (using oxygen as the main oxidant) at 90 ºC in the presence of a catalytic quantity of radical initiator. This approach was applied to the one-pot multi-step oxidative carboxylation of 1-decene in the presence of 1 % Ru/support-Pr4NBr/ZnBr2 catalyst

Synthesis and Antimicrobial Activity of Dithiocarbamates of ω-Substituted (2-naphthyloxy)alkanes

A series of dithiocarbamates of ω-substituted (2-naphthyloxy) alkanes was developed through condensation of 2-(2-chloro-alkoxy)-naphthalene to various kinds of aliphatic, aromatic, alicyclic, heterocyclic primary and secondary amines employing benzyl trimethyl ammonium hydroxide in catalytic quantity (Triton-B/CS2 system) afforded desired products in high yields (82-98 %). The complete series of synthesized compounds (4-48) were evaluated for antimicrobial activity through microdilution method using various bacterial and fungal strains. The antifungal and antibacterial values were estimated as MIC values. Fluconazole and ciprofloxacin [16 to 0.03 μg/mL] were used as the standard antifungal and antibacterial drug, respectively. Out of series of evaluated compounds, some of these compounds such as compounds 28, 29, 30, 31, 32, 33 have displayed maximum potency which is comparable to standard drugs.

Gold Catalyzed Hydroamination of Propargylic Alcohols: Controlling Divergent Reaction Pathways to Access 1,3-Aminoalcohols, 3-Hydroxyketones or 3-Aminoketones

A versatile approach to the valorization of propargylic alcohols is reported, enabling controlled access to three different products from the same starting materials. Firstly, a general method for the hydroamination of propargylic alcohols with anilines is described using gold catalysis to give 3-hydroxy imines with complete regioselectivity. These 3-hydroxyimines can be reduced to give 1,3-aminoalcohols with high syn seletivity. Alternatively, by using a catalytic quantity of aniline, 3-hydroxyketones can be obtained in high yield directly from propargylic alcohols. Further manipulation of the reaction conditions enables the selective formation of 3-aminoketones via a rearrangement/hydroamination pathway.<br>

Gold Catalyzed Hydroamination of Propargylic Alcohols: Controlling Divergent Reaction Pathways to Access 1,3-Aminoalcohols, 3-Hydroxyketones or 3-Aminoketones

A versatile approach to the valorization of propargylic alcohols is reported, enabling controlled access to three different products from the same starting materials. Firstly, a general method for the hydroamination of propargylic alcohols with anilines is described using gold catalysis to give 3-hydroxy imines with complete regioselectivity. These 3-hydroxyimines can be reduced to give 1,3-aminoalcohols with high syn seletivity. Alternatively, by using a catalytic quantity of aniline, 3-hydroxyketones can be obtained in high yield directly from propargylic alcohols. Further manipulation of the reaction conditions enables the selective formation of 3-aminoketones via a rearrangement/hydroamination pathway.<br>

Palladium–Catalysed Magnesiation of Benzene

In the presence of a catalytic quantity of a palladium bis(phosphine) complex, a reagent containing a Mg-Mg bond effects the C-H functionalisation of benzene. The resulting 100% atom efficient transformation generates an unprecedented aryl magnesium hydride.

Palladium–Catalysed Magnesiation of Benzene

In the presence of a catalytic quantity of a palladium bis(phosphine) complex, a reagent containing a Mg-Mg bond effects the C-H functionalisation of benzene. The resulting 100% atom efficient transformation generates an unprecedented aryl magnesium hydride.

Palladium-catalysed magnesiation of benzene

In the presence of a catalytic quantity of [Pd(PCy3)2], a reagent containing a Mg–Mg bond effects the C–H functionalisation of benzene resulting in a 100% atom efficient transformation to generate an unprecedented aryl magnesium hydride.

The remarkable journey of catalysts from stoichiometric to catalytic quantity for allyltrimethylsilane inspired allylation of acetals, ketals, aldehydes and ketones

Allyltrimethylsilane inspired allylation of acetals, ketals, aldehydes, and ketones comprises one of the most viable, significant and graceful methods for the formation of carbon–carbon bonds leading to stereochemical transformation.