After the discovery of graphene, a lot research has been conducted on two-dimensional (2D) materials. In order to increase performance 2D materials and expand their applications, two different layered are usually combined by van der Waals (vdW) interactions form heterostructure. this work, based first-principles calculation, some charming properties heterostructure constructed Hf2CO2, AlN GaN addressed. The results show that Hf2CO2/AlN Hf2CO2/GaN vdW heterostructures can keep original band...

Benefited by the accessible ynamido–lithium intermediates Ib from a Cu-catalyzed azide–alkyne cycloaddition in presence of stoichiometric amounts LiOH, mild and flexible three-component route to conjugated enyne scaffolds was successfully achieved via formal E-selective olefination strategy.

The convergent synthesis of a class enediyne-imides as well their palladium-catalyzed branching cyclizations, which can be accomplished in two ways leading to set polysubstituted furo[2,3-b]pyridines upon using the N-tosyl carboxamide moiety an N,O-bisnucleophile, are presented.

A tunable copper-catalyzed azide–alkyne cycloaddition (CuAAC)-initiated multicomponent reaction strategy for the construction of 3-functionalized indolin-2-ones is reported. Upon controlling ring opening four-membered O-heterocyclic intermediates, this unique method enables divergent derivatization N-protected isatins to give three-component (3-CR) and four-component (4-CR) adducts, respectively.

Tri- and tetracyclic heterocycle systems were constructed by a palladium-catalyzed domino reaction of linear 1,6-dienes that contain acryl groups with aryl halides through C-C coupling aromatic C-H functionalization. Three different acrylamides have been shown to be very active for the reaction. The substituents on could ethoxycarbonyl, ketyl, chloro, sulfonyl, cyano, etc. Thus, ready accessibility starting materials, wide range compatibility substrates including both dienes halides,...

Drei auf einen Streich: Nichtaktivierte Diene mit einer Cycloalkenyleinheit bilden in Gegenwart von Pd(OAc)2/PPh3 Vielzahl substituierter Arylhalogenide kondensierte polycyclische Heterocyclen (siehe Schema). Bei dieser Dominoreaktion, die hoch regioselektive C-C-Kupplungs- und C-H-Funktionalisierungsschritte umfassst, werden drei C-C-Bindungen gebildet. DMF=N,N-Dimethylformamid, Bn=Benzyl, Ts=p-Toluolsulfonyl. Detailed facts of importance to specialist readers are published as ”Supporting...

An efficient asymmetric conjugate addition of trimethylsilyl cyanide (TMSCN) to chalcones, catalyzed by bifunctional Py-BINMOL-Mg complex, with moderate good enantioselectivities and in yields, has been realized this work.

Abstract The synthesis of fused, highly substituted chromenes in a one‐pot‐three‐step cascade hexadehydro‐Diels–Alder reaction tetraynes followed by an intermolecular α,β‐unsaturated aldehyde rearrangement is reported. target compounds were prepared the condensation malonates with 3‐bromo‐1‐propyne, and resulting 2,2‐di(1‐propyn‐3‐yl)malonates underwent cross‐coupling phenylethynyl bromides to afford 2,2‐di(5‐phenyl‐2,4‐pentadiynyl)malonates, which intramolecular cyclization produce...

The use of ligands to tune the reactivity and regioselectivity transition metal‐based catalyst for silicon‐mediated organic synthesis (SiMOS) is an important topic challenge in organosilicon chemistry synthetic chemitstry. In this manuscript, dual ligand platinum system was developed hydrosilylation alkynes. It found that enhancement determined with combinational phosphine (6a) multifunctional Py‐BINMOL (4a). corresponding vinylsilanes were obtained high yields regioselectivities.

The construction of Betti base-derived γ-amino alcohols and all-substituted pyrrolidine derivative with multiple stereogenic centers has been developed successfully through neighboring lithium-assisted [1,2]-Wittig rearrangement (NLAWR).

It was found that 1,2-trifluoromethylation reactions of ketones, enones, and aldehydes were easily accomplished using the Prakash reagent in presence catalytic amounts cesium carbonate, which represents an experimentally convenient, atom-economic process for this anionic trifluoromethylation non-enolisable ketones.

In the tandem mass spectrometry of protonated N-(3-phenyl-2H-chromen-2-ylidene)benzenesulfonamides, precursor ions have been observed to undergo gas-phase dissociation via two competing channels: (a) predominant channel involves migration sulfonyl cation phenyl C atom and subsequent loss benzenesulfinic acid along with cyclization reaction, (b) minor one ion give an ion/neutral complex [sulfonyl cation/imine], followed by decomposition afford or INC-mediated electron transfer imine radical...

A series of N-(1,3-diphenylallyl)benzenamine derivatives (M) were investigated by electrospray ionization mass spectrometry in the positive-ion mode. Both anomalous [M-H]+ and regular [M+H]+ observed ESI spectra. The occurrence has been supported accurate spectrometry, liquid chromatography tandem analysis. Calculation results indicated that formation is attributed to ion-molecule reaction M with protonated solvent molecule (e.g. CH3OH2+) via hydride abstraction from a tertiary Csp3-H....

Soil water is the main source for plants, which replenished by rainfall in water-limited agricultural systems. Quantifying temporal dynamics of soil deficit and its replenishment can evaluate whether meet demand plants. This would provide accurate guide when how irrigation practices conducted. However, this topic has not been deeply elucidated. In study, content at varied depths precipitation were continuously monitored during two growing seasons an apple orchard Loess Plateau China....

The combined reagent of iodobenzene diacetate (or polymer-supported diacetate) with iodine or bromine was used as an effective halogenative agent 6-methyluracil derivatives to the corresponding 5-halo-6-methyluracil at room temperature high yields.

In the title N -tosylacrylamide compounds, C 20 H 17 NO 4 S, (I), and 23 21 3 (II), conformation about C=C bond is E . The acrylamide groups, [–NH—C(=O)—C=C–], are almost planar, with N—C—C=C torsion angle being −170.18 (14)° in (I) −168.01 (17)° (II). furan, phenyl 4-methylbenzene rings inclined to mean plane by 26.47 (11), 69.01 (8) 82.49 (9)°, respectively. phenyl, 3-methylbenzene 11.61 (10), 78.44 (10) 78.24 (10)°, There an intramolecular C—H...π interaction present compound crystals of...

On the basis of reaction (E)-4-methyl-1-phenylpent-2-en-1-one with chalcone and derivatives in ionic liquids [BMIM]PF 6 , highly regio-and diastereo-selective syntheses 1,5-dicarbonyls have been achieved.

The title compound, C

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