Unusual reverse face-to-face stacking in propylene linked pyrazole system: perspective of organic materials

Synthesis of 1,3-Dioxepine-Fused (Tricyclic) Bispyrazoles Involved with Pyrazolone Derivatives and Dichloromethane

A simple and novel method for the synthesis of novel 1,3-dioxepine-fused (tricyclic) bispyrazoles is described. It involves a Cs₂CO₃-mediated O-alkylation of readily available pyrazolone derivatives with dichloromethane as the methylene source followed by PhI(OAc)₂-mediated intramolecular oxidative biheteroaryl coupling under mild conditions. This scalable protocol was applied for the preparation of valuable and novel 1,3-dioxepine-fused (tricyclic) bispyrazoles that could find applications in medicinal or material chemistry.

Polymorphic study and anti-inflammatory activity of a 3-cyano-2-pyridone based flexible model

A polymorphic interpretation and biological evaluation of 2-{3-[3-cyano-6-methyl-2-oxo-4-phenylpyridin-1(2H)-yl]propoxy}-4-methyl-6-phenylnicotinonitrile (2) have been performed in this study.

Face-to-face stacking in sulfonamide based bis-ethylene bridged heteroaromatic dimers

Four sulfonamide based bis-ethylene bridged heteroaromatic dimers were crystallized in offset face-to-face stacked geometry. Further, density functional theory revealed that crystallized structures were the most stable conformers.