a number of 6-hydroxy-2-benzylidene-3-coumaranones were synthesized from condensation of 6-hydroxy-3-coumaranone with appropriate aldehydes and were evaluated for their antioxidant activities. the antioxidant activity was assessed using two methods, including, 1,1-biphenyl-2-picrylhydrazyl (dpph) radical scavenging, and reducing power assays. some of the benzylidene coumaranones showed antioxid...

the main goal of this work was to synthesize and evaluate the effect of dehydration temperature on the potential application of hydroxy sodalite zeolite membrane. hydroxy sodalite zeolite membranes were synthesized via direct hydrothermal method onto a tubular alumina support without seeding in a hot air oven. the synthesized membranes were characterized by x-ray diffraction (xrd) and scanning ...

metalloporphirins; cu(tpp), mn(tpp)cl, co(tpp), fe(tpp)cl, zn(tpp) and mn(obp)cl catalyze region and chemoselective silylation of hydroxyl groups with hmds. fe(tpp)cl is the most effective catalyst and silylation occurs immediately in its presence at room temperature.

This search involved synthesis of several new N-Substituted -3-chloro-
 2-azetidinones which were known as a high medicinal effectiveness for 2,
 4-Diamino-6-hydroxy pyrimidin in two steps. The first step included
 preparation Shiff bases (1-6) by condensation 2, 4-Diamino-6-hydroxy
 with many substituted aldehydes(4-hydroxy benzaldehyde, 2-
 bromobenzaldehyde, 4-dimeth...

Af-Hydroxy-1-aminonaphthalene (JV-hydroxy-1-AN), N-hydroxy-2-aminonaphthalene (N-hydroxy-2-AN), 1-aminonaphthalene (1-AN), 2-aminonaphthalene (2-AN), and 2-amino1,4-naphthoquinone were repeatedly injected i.p. into rats at a dose of 5 mg/100 gm. Lower doses of 2-amino-l-naphthol (0.15 mg/100 gm), and of #-hydroxy-aniline (1.3 mg/100 gm) were also given i.p. ./V-Hydroxy-1-AN was a more potent ca...

The total synthesis of two natural phenolglycosides of the family Salicaceae, namely: populoside and 2-(β-d-glucopyranosyloxy)-5-hydroxy benzyl (3-methoxy-4-hydroxy) cinnamoate and nine not found yet in plants acyl derivatives of phenoglycosides: 2-(β-d-glucopyranosyloxy)-benzylcinnamoate, 2-(β-d-glucopyranosyloxy)-benzyl (4-hydroxy) benzoate, 2-(β-d-glucopyranosyloxy)-benzyl (3-methoxy-4-hydro...

The Front Cover shows one of the three types hydrogen bonding observed in hydroxy-functionalized halide salts. Here, anion forms a bond to hydroxy group and interacts with ring system cation at same time. versatility structures demonstrates importance non-covalent interactions, particular role bonding. More information can be found Communication by Ralf Ludwig co-workers.