Chromophoric polyureas with pendant 3-hydroxynaphthalene group: synthesis and characterization
The reaction of 4-(3-hydroxynaphthalene)-1,2,4-triazolidine-3,5-dione (
Synthesis and Characterization of New Self Colored Thermally Stable Poly(amide-ether-urethane)s Based on an Azo Dye and Different Diisocyanates
In this work, four series of new self-colored segmented polymeric dyes were successfully
Synthesis and Characterization of Novel Optically Active Poly(amide-imide)s.
Abstract
4,4′-(Hexafluoroisopropylidene)-bis-(phthalic anhydride) (1) was reacted with L-leucine (2) in toluene solution at refluxing temperature in the presence of triethylamine and the resulting imide-acid (4) was obtained in quantitative yield. The compound (4) was converted to the diacid chloride (5) by reaction with thionyl chloride.
Tetrabutylammonium bromide: An Efficient, Green and Novel Media for Polycondensation of 4-(4-Dimethylaminophenyl)-1,2,4-triazolidine-3,5-dione with Diisocyanates
This is the first report of application of molten ionic liquid (MIL) for the synthesis o
Ionic liquids as novel, green media for clean synthesis of soluble aromatic-aliphatic poly(amide-ester)s containing hydroxynaphthalene urazole moiety
Ionic liquids (IL)s are very attractive and environmentally acceptable solvents.
Benzyltriphenylphosphonium dichromate as a mild reagent for oxidation of thiols and sulfides
Abstract:
Oxidation of thiols and sulfides under non-aqueous and aprotic conditions uses benzyltriphenylphosphonium dichromate (1, PhCH2PPh3)2 Cr2O7) which is very easily prepared by mixing an aqueous solution of benzyltriphenylphosphonium chloride with CrO3 in 3N HCl at room temperature.
Solid-State Polymerization of 4-(4-Dimethylaminophenyl)-urazole with Diisocyanates
In the present study, the solid-state thermal polymerization of 4-(4-dimethylaminophenyl)-1,2,4-triazolidin
Step-Growth Polymerization of 5-(3-Acetoxynaphthoylamino)isophthalic acid with Different Aromatic Diols
Soluble and photoactive novel aromatic polyesters containing acetoxynaphthalamide unit in the side chain have been synthesized with moderate molecular weights by direct polycondensation of 5-(3-acetoxynaphthoylamino)isophthalic acid with different aromatic diols using tosyl chloride (TsCl), pyridine (Py) and N,Ndimethylformamide (DMF) system as a condensing agent.