JBCS

This review highlights the increase in the number of absolute configuration reassignments of natural products over the last decade and describes the main approaches used both in the original incorrect assignments and stereochemical corrections. It also provides the readers with critical information for the choice of appropriate methods for unambiguous stereochemical determination.

The furyl-substituted 3-hydroxychromone ligand forms stable complexes with M^II ions. Complex [Sn(L)₂] represents the first structurally characterized Sn^II complex with this kind of ligand and presented high fluorescence emission.

Heterogeneous photocatalysis and photolysis were employed to degrade triclosan (5-chloro-2-(2,4-dichlorophenoxy)phenol) with evaluation of ecotoxicity. The degradation was associated with the formation of transformation products whose structures are reported for the first time.

The polyethylene glycol-400 (PEG-400) acts like a crown ether, making the NaHY more active to prepare chalcogenflavones by the ring closure of 2-chlorophenyl ethynyl ketone.

Fast and energy-saving synthesis developed for multicolor upconverting materials.

Guanitoxin is a potent cyanotoxin that can be hydrolyzed gradually at alkaline pH and temperatures > 23 °C, resulting in the dephosphorylated degradation product m/z 159.1240 [M + H]⁺.

Multivariate optimization was used in the meglumine antimoniate synthesis in order to obtain a drug with low levels of Sb^III and consequently reduce side effects and development of drug resistance.

β,β-Disubstituted-1,3-dinitrocompounds were obtained in "one pot" via addition of nitromethane to different ketones using DBU (1,8-diazabicyclo[5.4.0]undec-7-ene) 50%, as base. Additionally, allylic nitro compounds could be obtained via a sequence Henry reaction, acetylation acid catalyzed and subsequent Henry reaction with varied aldehydes.

The poison extracted from the frog had its chemical composition identified. Male Swiss mice treated with methanolic poison extract were evaluated for oxidative stress, immunomodulatory action and the histopathological effects of the treatment during 7 or 30 days.

SAPO-34 molecular sieve was modified to develop a catalyst for the preparation of 5-hydroxymethylfurfural (5-HMF) from fructose dehydration.

Starch from mango kernel was turned into swelling thermoresponsive nanoparticles with suitability for cell- and blood-contacting applications.

Chemical identification and determination of forage palm biomarkers (Opuntia spp. and Nopalea spp.) associated with non-susceptibility to carmine cochineal.

The molecular geometries of target drugs in 2D optimized by calculations of the density functional theory are subjected to investigations of their molecular properties and molecular docking simulations.

DexS/Pram (dextran sulfate/pramlintide) polyelectrolyte nanoparticles were successfully developed. Interestingly, self-assembling reduces the peptide conversion to β-sheet conformation. Colloidal stability and Pram release are depending on the ionic strength of the medium.

Anticorrosive effect of imine-chalcone (IM-F) on carbon steel in 1 mol L^-1 HCl using experimental methods and theoretical calculations.

High-performance liquid chromatography coupled to a diode array detector (HPLC-DAD) polyphenol profiles and the kaempferitrin content in Uncaria guianensis (UG) leaves collected in different locations of the Brazilian Amazon rainforest reinforce this flavonoid as a suitable chemical marker for UG leaves instead of the putative oxindole alkaloids.

Synergistic effect between Fe₃O₄ NPs and AuNPs supported on biochar is demonstrated in the p-nitrophenol reduction.