The unusual nonbifunctional outer-sphere strategy was successfully utilized in developing an easily accessible N-heterocyclic carbene manganese (NHC-Mn) system for highly active α-alkylation of ketones with alcohols. This efficient a wide range and alcohols under mild reaction conditions, also the green synthesis quinoline derivatives. direct mechanism high activity present demonstrate potential catalyst design acceptorless dehydrogenative transformations.

A bifunctional strategy for efficient Ir-catalyzed <italic>N</italic>-alkylation of amines and sulfonamides with alcohols under aqueous base-free conditions.

To achieve efficient palladium-catalyzed cross-coupling reaction under mild conditions with the flexible steric bulk strategy, a series of Pd-PEPPSI (PEPPSI: pyridine-enhanced precatalyst preparation, stabilization, and initiation) complexes C1-C6 were synthesized characterized, in which unsymmetric was introduced on N-aryl ancenaphthyl skeleton. These well-defined palladium found to be excellent precatalysts for Buchwald-Hartwig amination aryl chlorides amines air. The electronic effect...

Abstract A sustainable and green route to access diverse functionalized ketones via dehydrogenative–dehydrative cross‐coupling of primary secondary alcohols is demonstrated. This borrowing hydrogen approach employing a pincer N‐heterocyclic carbene Mn complex displays high activity selectivity. variety are well tolerant result in satisfactory isolated yields. Mechanistic studies suggest that this reaction proceeds direct outer‐sphere mechanism the dehydrogenation alcohol substrates plays...

An example of homogeneous Mo-catalyzed direct N-alkylation anilines or nitroarenes with alcohols is presented. The DFT aimed design suggested the easily accessible bis-NHC-Mo(0) complex features a strong hydride-donating ability, achieving effective challenging alcohols. enhanced strategy should be useful in designing highly active systems for borrowing hydrogen transformations.

A Ru catalyst with the hetero-bidentate NHC-phosphine ligand, which realizes <italic>N</italic>-alkylation of amines alcohols improved catalytic activity.

With the goal of achieving highly efficient palladium-catalyzed cross-coupling reactions under mild reaction conditions, Pd-PEPPSI complexes C1 and C2 bearing 1,2-di(tert-butyl)acenaphthyl (DtBu-An) backbones were synthesized characterized, their use in Suzuki–Miyaura was investigated. The effects catalyst structure conditions on efficiency evaluated detail. significant differences catalytic activity compared with classical PEPPSI-IPr PEPPSI-IPrAn precatalysts are discussed, where axial...

An efficient one-step protocol has been developed to access a variety of 2-amino-1,3-benzoxazine derivatives via tetrabutylammonium iodide-mediated electrochemical desulfurative cyclization isothiocyanates and 2-aminobenzyl alcohols. The reaction proceeds through cycle involving in situ iodine generation, cyclization, iodide regeneration, efficiently forming intermolecular C–O C–N bonds affording 2-amino-1,3-benzoxazines moderate excellent yields. practical utility this strategy is evidenced...

Rigid hindered N-heterocyclic carbene palladium complexes have been developed and exhibited high activities for a variety of (hetero)aryl chlorides with (hetero)anilines amines under aerobic conditions.

Abstract The implementation of non‐noble metals mediated chemistry is a major goal in homogeneous catalysis. Borrowing hydrogen/hydrogen autotransfer (BH/HA) reaction, as straightforward and sustainable synthetic method, has attracted considerable attention the development metal catalysts. Herein, we report tungsten‐catalyzed N ‐alkylation reaction anilines with primary alcohols via BH/HA. This phosphine‐free W(phen)(CO) 4 (phen=1,10‐phenthroline) system was demonstrated practical easily...

A new class of large-but-flexible Pd-BIAN-NHC catalysts (BIAN=acenaphthoimidazolylidene, NHC=N-heterocyclic carbene) has been rationally designed to enable the challenging Buchwald-Hartwig amination coordinating heterocycles. This robust BIAN-NHC permits cross-coupling under practical aerobic conditions a variety heterocycles with aryl, alkyl, and heteroarylamines, including historically oxazoles thiazoles as well electron-deficient containing multiple heteroatoms BIAN-INon...

In this paper, we describe a Re2O7-mediated ring-opening arylation of unactivated arylcyclopropane because its functionalization with various arenes via Friedel–Crafts-type reactivity. This protocol allows facile access to functionalized 1,1-diaryl alkanes and is characterized by broad substrate scope, mild reaction conditions, high efficiency, atom economy. Both density functional theory calculations deuterium labeling experiments were carried out justify the indispensable role HFIP in...

Abstract Alcohols are widely available and can be derived from renewable resources. Catalytic alcohol amination for N ‐alky amine synthesis using the borrowing hydrogen strategy is an environmentally benign prominent sustainable method, which produces water as sole byproduct. However, expensive noble metals generally employed this transformation, while nonprecious metal‐based catalysts were also known reaction have attracted considerable attention recently. Herein, efficient ‐alkylation of...

Two new Schiff‐base bismuth (III) complexes were prepared by an equivalent reaction between ligand and Bi (NO 3 ) •5H 2 O with the assistance of Mannitol. The chemical structures two characterized spectroscopic studies (FT‐IR, NMR, MS), elemental analysis, single‐crystal X‐ray diffraction. ligand‐to‐metal ion ratio was found to be 1:1 in complexes. During formation complexes, Schiff bases changed from amidic forms iminol forms, resulting tautomers could coordinate ions produce dinuclear III...

Since heavy metal ion-contaminated water pollutionis becoming a serious threat to human and aquatic lives, new methods for highly efficient removal of ions from wastewater are important tackle environmental problems sustainable development. In this work, we investigate the performances copper (II) aqueous solutions using gas hydrate-based method. Efficient via methane hydrate process was demonstrated. The influence temperature, hydration time, concentration, stirring rate on were evaluated....

Conjugated diyne derivatives are important scaffolds in modern organic synthetic chemistry. Using the Glaser reaction involves coupling of terminal alkynes which can efficiently produce conjugated derivatives, while use a stoichiometric amount copper salts, strong inorganic base, and excess oxidants is generally needed. Developing an environmentally friendly effective method for construction symmetrical 1,3-diynes compounds by still highly desirable. In this study, we present economical...

The current study involved the preparation of a number MnOx/Sep catalysts using impregnation (MnOx/Sep-I), hydrothermal (MnOx/Sep-H), and precipitation (MnOx/Sep-P) methods. that were produced examined for their ability to catalytically oxidize formaldehyde (HCHO). Through use several technologies, including N2 adsorption–desorption, XRD, FTIR, TEM, H2-TPR, O2-TPD, CO2-TPD, XPS, function MnOx in HCHO elimination was examined. MnOx/Sep-H combination shown have superior catalytic activities,...

The removal of nitrogen trifluoride (NF

Abstract A direct electrochemical redox reaction involving radical cross‐coupling cyclization for the synthesis of pyrrolo[1,2‐ a ]quinoxaline derivatives from 1‐(2‐aminophenyl)pyrroles and CH 3 CN has been developed, which includes functionalization C( sp )−H bonds as well construction C−C C−N bonds. Notably, control deuterium‐labelling experiments suggest that in this acts both carbon source via cleavage solvent. The features metal‐ oxidant‐free conditions, various substituted were obtained.

The purpose of this research was to reduce the amount noble metal palladium catalyst and improve catalytic performance in Suzuki?Miyaura cross-coupling reaction, which is key step synthesis Boscalid. Taking o-bromonitrobenzene p-chlorophenylboronic acid as raw materials, three kinds Pd-PEPPSI-IPr catalysts were synthesized employed Suzuki then biaryl product subjected reduction condensation reaction give Under optimal conditions, result showed that system exhibits highest efficiency under...