One-Pot Synthesis of Novel 2-(Thiazol-2-yl)-4,5-dihydropyridazin-3(2H)-one Derivatives Catalyzed by Activated KSF

A series of 2-(thiazol-2-yl)-4,5-dihydropyridazin-3(2H)-one derivatives were synthesized by one-pot multicomponent cyclocondensation of ketoacid, thiosemicarbazide, and phenacyl bromide using catalytical amount of KSF in EtOH under reflux. The straightforward synthesis, presence of two important class of heterocyclic rings in the individual molecule, easy workup of the products, rapid reaction, mild conditions, and good to excellent yields are notable features of this protocol.

[Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications® for the following free supplemental resource(s): Full experimental and spectral details.]     

Diimino Nickel Complex Anchored into the MOF Cavity as Catalyst for Epoxidation of Chalcones and Bischalcones

Nickel-pyridylimine complex was incorporated into (Cr)NH₂-MIL-101 through condensation of 2-pyridine carboxaldehyde and NiCl₂ in presence of (Cr)NH₂-MIL-101-MOF in a one pot method. The prepared catalyst was characterized by XRD, FTIR, SEM, TEM and NMR methods. The obtained catalyst demonstrates an appropriate pattern for a post-synthetic covalent modification with catalytic active sites. This heterogeneous catalyst showed efficiency in the epoxidation reaction of chalcones and bischalcones, and exhibited appropriate recyclability, rather short reaction times and high yields.     

[TBP]2SO4 ionic liquid catalyst for 4MCR of pyridazinoindazole,indazolophthalazine and pyrazolophthalazine derivatives

Molecular Diversity - Tetrabutyl phosphonium sulfate ([TBP]2SO4), as novel room-temperature ionic liquid (RTIL), was synthesized by a simple cost-effective method, characterized by 1H, 13C, 31P NMR...     

Evaluating the Synthesis of Bis‐pyrazolines

The bis‐cyclization of chalcone with thiosemicarbazide under basic condition led to the formation of new compounds, thiocarbamoyl bis‐pyrazoline derivatives. Bis‐chalcones were prepared by a Claisen–Schmidt condensation between 1 mol bis‐aldehyde and 2 mol acetophenone derivatives in the presence of sodium hydroxide as a catalyst. The structures of all compounds were elucidated by IR, ¹H NMR, and ¹³C NMR spectral data and by elemental analyses.     

HAp‐encapsulated γ‐Fe2O3‐supported dual acidic heterogeneous catalyst for highly efficient one‐pot synthesis of benzoxanthenones and 3‐pyranylindoles

A novel method is reported for the synthesis of benzoxanthenone and 3‐pyranylindole derivatives via one‐pot three‐component reactions using a newly synthesized HAp‐encapsulated γ‐Fe₂O₃‐supported dual acidic heterogeneous catalyst, as a reusable and highly efficient nanocatalyst. In this protocol the use of the nanocatalyst provided a green, useful and rapid method to generate products in short reaction times (4–20 min) and in excellent yields (87–96%). The paramagnetic nature of the catalyst provided a simple, trouble‐free and facile approach for the separation of the catalyst by applying an external magnet, and it could be used in eight cycles without significant loss in catalytic efficiency.     

Investigation of coupling length in a semi-cylindrical surface plasmonic coupler

We have investigated the performance of a nano-optical directional coupler based on gap plasmon waveguides. The coupler consists of two waveguides having a localized coupled plasmon propagating between two semi-cylindrical surfaces. After introducing a fundamental mode of studied waveguides, effects of the structure parameters on the coupling length are shown. Simulation results of the coupler obtained by the compact-2D finite-difference time-domain (FDTD) method comply with those derived by an analytic method with the aid of the finite-element frequency-domain (FEFD) software package of COMSOL.     

Recent synthetic routes for the synthesis of symmetrical <Emphasis Type="Italic">tris</Emphasis>-compound

This review article explains sensible synthesis and applications of symmetrical tris-compounds in the past few years. The aim of this review is collecting the different procedures for the synthesis of tris-compounds with special cores. Many of these compounds principally were prepared from a precursor to the tris-structure under the various conditions. One of the key purposes of this review is to collect a series of symmetrical tris-compounds which represent varied biological and synthetical applications.     

Synthesis and Photochromic Properties of New Heterocyclic Derivatives of 1,3‐Diazabicyclo[3.1.0]Hex‐3‐Ene

The facile synthesis of several 1,3‐diazabicyclo[3.1.0]hex‐3‐ene derivatives with varying substitutions such as 2‐methyl‐6‐(4‐nitrophenyl)‐2,4‐diphenyl‐( 1 ), 2‐methyl‐6‐(4‐nitrophenyl)‐4‐phenyl‐2‐(pyridin‐3‐yl)‐( 2 ), 2‐(furan‐2‐yl)‐6‐(4‐nitrophenyl)‐4‐phenyl‐( 3 ), 2‐(furan‐2‐yl)‐6‐(3‐nitrophenyl)‐4‐phenyl‐( 4 ), 6‐(3‐nitrophenyl)‐2,4‐diphenyl‐( 5 ) and 6‐(4‐chlorophenyl)‐4‐(3‐nitrophenyl)‐2‐phenyl‐( 6 ) that all behave as “intelligent materials” are reported.     

Activated nitriles in heterocyclic synthesis. The reaction of cinnamonitrile derivatives with active methylene reagents

The reaction of substituted cinnamonitrile derivatives with cyanoacetanilide and with ethyl acetoacetate produced several new polyfunctional pyridine and pyran derivatives. Evidence for assigned structure of the reaction products and the possible mechanisms of their formation is presented.     

Solitary solution of modified bad and good Boussinesq equation by using of tanh and extended tanh methods

In this work, a mathematical approach based on the reduction of order for solving ordinary differential equations, the standard tanh method and the extended tanh method has been used to obtain solutions of modified bad Boussinesq and modified good Boussinesq equations.