An efficient protocol for the synthesis of 3,4-dihydropyrimidin-2-(1H)-one/thione derivatives via multi-component coupling reaction of aromatic aldehydes, β-ketoester and urea or thiourea under solvent-free conditions using Silica Supported Barium Chloride as a catalyst is described. All prepared compounds with melting points, IR,1H NMR and 13C NMR were identified. High yields, mild conditi...

A new series of N-[2-(1H-1,2,3-benzotriazol-1-yl)ethyl]-4-(substitutedphenyl)-3-chloro-2-oxo-1-iminoazetidine, compounds 4(a-j) were synthesized. The structures of all the synthesized compounds were confirmed by chemical and spectral analyses such as IR, 1H NMR, 13C NMR and FAB-Mass. The compounds 4(a-j) were screened for their antibacterial, antifungal and antitubercular activities and gave ac...

The tautomerism of 1-phenyl-1,2-dihydro-3H-pyrazol-3-One was investigated. An X-ray crystal structure analysis exhibits dimers of 1-phenyl-1H-pyrazol-3-ol units. Comparison of NMR (nuclear magnetic resonance) spectra in liquid state (¹H, 13C, 15N) with those of "fixed" derivatives, as well as with the corresponding solid state NMR spectra reveal this compound to exist predominantly as 1H-pyrazo...

Introduction: Cannabidiol (CBD) has become a promising bioactive for the next decades after recent recognition of medical potential Cannabis derivatives by United Nations member countries, as it no psychotropic your isomer ∆9-tetrahydrocannabinol (∆9-THC). The differentiation these isomers been studied decades. Recent studies demonstrate that even with more subtle chemical characteristics, such...

We have observed 1H NMR spectra of hydrogen molecules trapped inside modified fullerene cages under cryogenic conditions. Experiments on static samples were performed at sample temperatures down to 4.3 K, while magic-angle-spinning (MAS) experiments were performed at temperatures down to 20 K at spinning frequencies of 15 kHz. Both types of NMR spectra show a large increase in the intramolecula...

Two publications from the same research group reporting on the detection of new possible biomarkers for the early diagnosis of Alzheimer's disease (AD), based on the analysis of cerebrospinal fluid samples (CSF) with 1H Nuclear Magnetic Resonance (NMR), are at the origin of the present study. The authors observed significant differences in 1H NMR spectra of CSF from AD patients and healthy cont...

Bu makalede, 4-metil-2,3-difenil-2,3-dihidro-1H-pirazol ve 4-(4-metil-5-fenil-2,5-dihidro-1H-pirazol-1-il)benzensulfonamid türevi bileşikler α,β-doymamış aldehit bileşiklerinin fenilhidrazin hidrat veya 4-sülfamoil fenil hidrazin hidrojen klorür ile tepkimelerinden elde edildi. reaksiyonların takibinde bileşiklerin aromatlaştırma tepkimeleri 2,3-dikloro-5,6-disiyano-1,4-benzokinon (DDQ) yapıldı...

The Chisocheton genus belongs to the Meliaceae family which produces various structures and activities of compounds, such as antimalarial, antimicrobial, antitumor, anti-inflammatory, cytotoxic. This plant has 53 species that are spread in tropical sub-tropical forests, including Indonesia. plants have been known produce limonoids, namely triterpenoid compounds modified lose four terminal carbo...

The purpose of this work is the synthesis new isonicotinic acid hydrazones, study their structure, reactivity and biological screening some synthesized compounds. reactions leading to N-arylidene(alkylidene) hydrazones via condensation hydrazide with various derivatives aromatic aldehydes were studied. structure functionally substituted was established by FTIR, 1H 13C NMR, two-dimensional COSY ...