Burstein and Lieberman (1) have reported a procedure for the examination of urinary ketosteroid sulfates which involves the extraction of an acidified urine with ethyl acetate followed by solvolysis of the sulfates in the organic phase at 39” for 24 hours. Although the previous authors (1) recognized that this technique partitions water and mineral acid into the ethyl acetate, they did not repo...

Substituted thiazolo ring-fused 2-pyridones, called pilicides, possess novel antibacterial properties and inhibit pilus assembly in Uropathogenic Escherichia coli. Recently, a small number of oxygen analogues of active pilicides have shown maintained ability to disrupt pilus assembly. Here an improved methodology for the synthesis of oxazolo ring-fused 2pyridones is presented, allowing dihydro ...

A number of SO3H-functionalized solids (biochar, montmorillonites, carbon and halloysite nanotubes) has been studied as catalysts in the cascade Prins-Ritter reaction (-)-isopulegol with benzaldehyde acetonitrile for synthesis octahydro-2H-chromene amides (as 4R- 4S-isomers). high selectivity to these products at 30 °C presence H2O was observed on modified chlorosulfonic acid (CSA) reaching 84%...

UV curable PUA resin was successfully synthesized from polyol based on sustainable resource originated from itaconic acid (IA), isophorone diisocyanate (IPDI) and 2-hydroxyethyl methacrylate (HEMA). A polyol was synthesized by condensation reaction of IA with 16-hexanediol in the presence of p-Toluenesulfonic acid (pTSA). The synthesized PUA resin was characterized for its structural elucidatio...

The therapeutic application of vitamin E is seri­ ously limited by its very low solubility in aqueous phases, and tocopherols cannot be used when in­ stant adm inistration of a strong antiradical and antioxidant agent is needed. To increase solubility in w ater and facilitate perm eability through cellu­ lar m em branes tocopherol can be attached to a carbohydrate moiety [1]. The synthesis of s...

In 1941 (1) the senior author entered the field of 16-substituted steroids with the view of preparing all of the three possible 16,17-epimers of natural estriol. Since that time two of these three epimers, 16-epiestriol (isoestriol-A) (2) and 17-epiestriol (3), have become available through our efforts and those of the Swiss investigators. In 1952 the present authors made an attempt to prepare ...

This study reports the immobilization of Candida Rugosa lipase (CRL) onto nanocellulose (NC) extracted from almond shells using p-toluenesulfonic acid (PTSA) and sulfuric (ASS) with sugar-based natural deep eutectic solvent (NADES1a) as a biocatalyst system. The properties both immobilized lipases were studied compared to free enzyme counterpart. Under optimized conditions (2 h, 40 ºC pH 7.0), ...

5-Hydroxymethylfurfural (HMF) is one of the promising chemicals, which can serve as a platform chemical to produce various energy chemicals. HMF be produced from different lignocellulosic biomass derived sugars employing catalytic processes. In this study, synthesis was investigated excessively available sucrose using environment friendly and cost-effective technology. Among solvents applied, d...

Developing the bio-based barrier material to substitute petroleum-based one is trend in functional packaging applications. Utilization of abundantly underappreciated bark biomass attractive from sustainability point view; however, an upgraded approach required maximize performances lignin-containing cellulose nanofibril (LCNF) films willow bark. Herein, hot water extraction (HWE) and microfluid...