To develop more potent small molecules with enhanced free radical scavenger properties, a series of N-substituted isatin derivatives was synthesized, and the cytoprotective effect on the apoptosis of PC12 cells induced by H2O2 was screened. All these compounds were found to be active, and N-ethyl isatin was found with the most potent activity of 69.7% protective effect on PC12 cells. Structure-...

The drivers for increasing incineration of sewage sludge and the characteristics of the resulting incinerated sewage sludge ash (ISSA) are reviewed. It is estimated that approximately 1.7 milliontonnes of ISSA are produced annually world-wide and is likely to increase in the future. Although most ISSA is currently landfilled, various options have been investigated that allow recycling and benef...

Indigo carmine is a typical recalcitrant dye which is widely used in textile dyeing processes. Laccases are versatile oxidases showing strong ability to eliminate hazardous dyes from wastewater. However, most laccases require the participation of mediators for efficient decolorization of indigo carmine. Here we describe the improvement of the decolorization ability of a bacterial laccase throug...

In the title compound, C(14)H(10)FN(3)O, the six- and five-membered rings of the isatin moiety and the six-membered ring of phenyl-hydrazone are nearly planar with r.m.s. deviations of 0.0003, 0.0004 and 0.007 Å, respectively. The dihedral angle between the phenyl ring and the isatin ring system is 6.09 (9)°. The mol-ecular structure is stabilized by a strong intra-molecular N-H⋯O hydrogen bond...

The ionic liquid, N,N,N,N-tetramethylguanidiniumtriflate (TMGTf) was found to be an efficient catalyst solvent for Henry reaction between nitromethane and isatin derivatives to provide 3-hydroxy-3-(nitromethyl)indolin-2-one under mild conditions. The ionic liquid amenable to successive recycling without appreciable decrease in activity. Synthesized compounds have been screened for their anti-di...

Isatin (3a), isatin 3-carbohydrazone (4a), 5-spiro (isatin) 2-(N-acetyl hydrazino) 4-(N-acetyl)-∆2-1,3,4 oxadiazoline (5a), and 5-spiro (isatin) 2-hydrazino∆2-1,3,4 oxadiazoline (6a) had been synthesized from the unsubstituted oximinoacetanilide (2a). 4-Chlorooximinoacetanilide (2b), 5-chloroisatin (3b), 5-chloroisatin 3-carbohydrazone (4b) and 5-spiro (5-chloroisatin) 2-(N-acetyl hydrazino) 4...

Isatin derivatives are one of most potent anticonvulsant agent of natural origin. It has display potent anticonvulsant effect in a wide variety of preclinical anticonvulsant models. Till date various isatin derivatives have been synthesized and evaluated for anticonvulsant activity. This review is an attempt to compile the medicinal chemistry of various synthesized isatin analogs. Isatin and it...

Room temperature zinc-mediated diastereoselective allylation or propargylation of isatin-derived N-tert-butanesulfinyl ketimines for synthesis of highly enantiomerically enriched tetrasubstituted 3-aminooxindoles is described.