J. Appl. Cryst.の発刊に際して

Late transition metal-catalyzed hydroamination and hydroamidation.

Silver is a less expensive noble metal. Superior alkynophilicity due to π-coordination with the carbon-carbon triple bond makes silver salts ideal catalysts for alkyne-based organic reactions. This review highlights the progress in alkyne chemistry via silver catalysis primarily over the past five years (ca. 2010-2014). The discussion is developed in terms of the bond type formed with the acetylenic carbon (i.e., C-C, C-N, C-O, C-Halo, C-P and C-B). Compared with other coinage metals such as Au and Cu, silver catalysis is frequently observed to be unique. This critical review clearly indicates that silver catalysis provides a significant impetus to the rapid evolution of alkyne-based organic reactions, such as alkynylation, hydrofunctionalization, cycloaddition, cycloisomerization, and cascade reactions.

Silver-catalysed reactions of alkynes: recent advances

A modified firefly algorithm-artificial neural network expert system for predicting compressive and tensile strength of high-performance concrete

/pdf/a-global-review-of-the-ecosystem-services-provided-by-ewwrlk69ly.pdf

A global review of the ecosystem services provided by bivalve aquaculture

One Pot Synthesis of 1‐Azaxanthones via Friedlaender Condensation.

β-Aminoketones are important intermediates for the synthesis of natural product, γ-aminoalcohol and auxiliaries 1 . The Michael reaction and its modified form such as aza-Michael, thio-Michael and carba-Michael reaction was one of the most exploited reactions in organic chemistry 2 . Michael addition reactions have attracted much attention as the most important carbon-carbon and carbon-heteroatom bond forming reactions. Some bioactive alkaloids, antibiotics and drugs were synthesized via the addition of electrophiles to α,β-unsaturated carbonyl compounds 3 . Although βaminoketones can be prepared by the classical Mannich reaction, it has several drawbacks such as harsh reaction conditions and longer reaction time. Therefore, a variety of methods appeared in the literature for the synthesis of β-aminoketones 4 . In the past few years, alternative procedures have been developed using various Lewis acid-induced reactions. Lewis acids such as AlCl3, TiCl4, SnCl4, CeCl3.7H2O-NaI, LiClO4 and system of clay were used. Interestingly, microwave-assisted chemistry offers new possibilities for the development of any chemical reaction that is thermally possible. It typically produces faster reaction and higher yields, and minimizes the formation of by-products. In addition, there exists the possibility that the reaction that fails under conventional heating could give the desired products under microwave irradiation 5 . Some recently reported examples have included one pot reaction 6

/pdf/synthesis-of-b-aminoketone-by-reaction-of-amine-and-1jzpq0yx3v.pdf

Synthesis of β-aminoketone by reaction of amine and activated chalcone in microwave irradiation

Efficient and Environmentally Friendly Synthesis of 1,2,3-Triazole Derivatives via [3+2] Cycloaddition and Their Potential as Lung Cancer Inhibitors: An In Silico Study

The Kagome lattice, a captivating lattice structure composed of interconnected triangles with frustrated magnetic properties, has garnered considerable interest in condensed matter physics, quantum magnetism, and quantum computing.The Ansatz optimization provided in this study along with extensive research on optimisation technique results us with high accuracy. This study focuses on using multiple ansatz models to create an effective Variational Quantum Eigensolver (VQE) on the Kagome lattice. By comparing various optimisation methods and optimising the VQE ansatz models, the main goal is to estimate ground state attributes with high accuracy. This study advances quantum computing and advances our knowledge of quantum materials with complex lattice structures by taking advantage of the distinctive geometric configuration and features of the Kagome lattice. Aiming to improve the effectiveness and accuracy of VQE implementations, the study examines how Ansatz Modelling, quantum effects, and optimization techniques interact in VQE algorithm. The findings and understandings from this study provide useful direction for upcoming improvements in quantum algorithms,quantum machine learning and the investigation of quantum materials on the Kagome Lattice.

Efficient VQE Approach for Accurate Simulations on the Kagome Lattice

The asymmetric unit of the title compound, C18H14ClNO3, contains two independent mol­ecules (A and B). In both mol­ecules, the cyclo­hexa­none ring has a chair conformation. The dihedral angles between the pyran ring and the pyridine and chloro­phenyl rings are 2.13 (9) and 2.19 (9)°, respectively, in A, and 0.82 (9) and 1.93 (9)°, respectively, in B. The carbonyl O atoms deviate from the pyran and benzene rings to which they are attached by −0.092 (2) and 0.064 (2) A, respectively, in A, and by −0.080 (2) and −0.063 (2) A, respectively, in B. In the crystal, the A mol­ecules are linked via C—H⋯O hydrogen bonds, forming double-stranded chains along [100]. They lie parallel to the double-stranded chains formed by the B mol­ecules, which are also linked via C—H⋯O hydrogen bonds. The chains stack up the c axis in an –A–A–B–B–A–A– manner, with a number of π–π inter­actions involving A and B mol­ecules; the centroid–centroid distances vary from 3.4862 (11) to 3.6848 (11) A

https://journals.iucr.org/e/issues/2013/02/00/su2550/su2550.pdf

Panneerselvam Yuvaraj

Papers

One Pot Synthesis of 1‐Azaxanthones via Friedlaender Condensation.

Synthesis of β-aminoketone by reaction of amine and activated chalcone in microwave irradiation

Efficient and Environmentally Friendly Synthesis of 1,2,3-Triazole Derivatives via [3+2] Cycloaddition and Their Potential as Lung Cancer Inhibitors: An In Silico Study

Efficient VQE Approach for Accurate Simulations on the Kagome Lattice

2-Chloro-8,8-dimethyl-8,9-dihydro-7H-chromeno[2,3-b]quinoline-10,12-dione.