Physicochemical studies of synthesized biscoumarin [3,3-(phenylmethylene)bis(4-hydroxy-2H-chromen-2-one)] in DMSO and various percentage compositions of ethanol in DMSO from 288.15 to 313.15 K

Organo‐Catalytic Approach for Biscoumarin Synthesis via a Biomass‐Derived Sustainable Strategy

“…Various reports are there on base catalyzed reactions such as Knoevenagel condensation, Michael addition reaction of C−H active compounds. As mentioned earlier our group has prepared carbohydrate based ionic liquids and examined their catalytic property in various reactions of active methylene compounds and chalcones [47,48] . The mechanism for the synthesis of biscouamrins via one‐pot pseudo three component reaction of 4‐hydroxycoumarin and aldehyde in the presence of catalyst RSIL‐l is outlined in Figure 3.…”

“…As mentioned earlier our group has prepared carbohydrate based ionic liquids and examined their catalytic property in various reactions of active methylene compounds and chalcones. [47,48] The mechanism for the synthesis of biscouamrins via one-pot pseudo three component reaction of 4-hydroxycoumarin and aldehyde in the presence of catalyst RSIL-l is outlined in Thereafter the recyclability of catalyst was also examined through the model reaction. After the reaction was finished, the solid product was filtered, and the filtrate was used in the next reaction.…”

Interaction Behavior of N-Lauroyl Sarcosine Sodium Salt (NLSS) and Benzethonium Chloride (BC) in Aqueous Human Serum Albumin (HSA) at Different Temperatures: A Volumetric and Acoustic Study

“…Moreover, Helper’s constant is calculated to know whether the selected surfactants behave as structure makers or structure breakers via the following thermodynamic relation , true( ∂ E ϕ ° ∂ T true) P = true( ∂ 2 V ϕ ° ∂ T 2 true) P = 2 c If the sign of Helper’s constant is positive, the solute is considered a water structure maker; otherwise, it is considered a water structure breaker. The true( ∂ E ϕ ° ∂ T true) P values as presented in Table S2 are negative, which signifies that both NLSS and BC act as water structure breakers in the investigated systems.…”

“…The values of apparent molar isentropic compressibility ( K ϕ,S ) of both NLSS and BC in water as well as in aqueous mixtures of HSA were obtained using the following equation , where k s signifies the isentropic compressibility of the solution and k S ° represents the isentropic compressibility of the pure solvent, which are obtained using the following equations , where u indicates the speed of sound of a given solution and u ° indicates the speed of sound in a given solvent. The u and K ϕ,S values are presented in Table .…”