Analysis of the dynamics of environmental degradation for 18 upper middle-income countries: the role of financial development.

This study aims at investigating the dynamics of environmental degradation by focusing on the financial development-CO emissions link. In this purpose, economic growth, renewable energy consumption, trade openness and urbanization are integrated into the CO emissions model as other explanatory variables. In this study, 18 upper-middle-income countries with the highest growth rate in the world are examined for the period 1990-2018 by AMG method, which considers the cross-sectional dependence and slope heterogeneity.

Absolute configuration and biological profile of pyrazoline enantiomers as MAO inhibitory activity.

A new racemic pyrazoline derivative was synthesized and resolved to its enantiomers using analytic and semipreparative high-pressure liquid chromatography. The absolute configuration of both fractions was established using vibrational circular dichroism. The in vitro monoamine oxidase (MAO) inhibitory profiles were evaluated for the racemate and both enantiomers separately for the two isoforms of the enzyme.

Atroposelective Synthesis of Axially Chiral Thiohydantoin Derivatives.

Nonracemic axially chiral thiohydantoins were synthesized atroposelectively by the reaction of o-aryl isothiocyanates with amino acid ester salts in the presence of triethylamine (TEA). The synthesis of the nonaxially chiral derivatives, however, gave thiohydantoins racemized at C-5 of the heterocyclic ring. The micropreparatively resolved enantiomers of the nonaxially chiral derivatives from the racemic products were found to be optically stable under neutral conditions.