APART FROM BIOMEDICAL AND INDUSTRIAL APPLICATION, DENDRIMERS HAVE BEEN USED AS CURING AGENTS [1]. THE STRUCTURE OF THESE BRANCHED MONODISPERSED CURING AGENTS HAS SIGNIFICANT EFFECT ON CHEMICAL AND MECHANICAL PROPERTIES OF THE EPOXY RESINS [2].ALIPHATIC DENDRIMERS SUCH AS POLYAMIDOAMINEPAMAM [3] AND POLY (PROPYLENE IMINE) PPI [4] HAVE BEEN RECENTLY USED AS CURING AGENT FOR AFEW EPOXY RESINS.HERE WE WISH TO REPORT THE SYNTHESIS OF SOME DENDRIMERS HAVING TRIAZINE CORES AND AMINO FUNCTIONALIZED SHELLS (1) AND THEIR APPLICATIONS AS CURING AGENTS FOR SOME COMMERCIAL EPOXY RESINS SUCH AS LY5052 AND EPON 828.THESE ARE TETRA- AND DI-GLYCIDYL EPOXY RESINS RESPECTIVELY.THE COMPARISON BETWEEN THE PROPERTIES OF THE ABOVE DENDRIMERIC CURING AGENTS AND ORDINARY ONES HAS BEEN ALSO PROVIDED.

TANDEM REACTIONS (TRS) ARE OF PARAMOUNT IMPORTANCE IN THE CONTEXT OF GREEN CHEMISTRY AS THEY OFFER A CONVENIENT STRATEGY FOR THE RAPID, ELEGANT AND CONVERGENT CONSTRUCTION OF COMPLEX ORGANIC MOLECULES WITHOUT ISOLATING AND PURIFYING THE INTERMEDIATES, RESULTING IN SUBSTANTIAL MINIMIZATION OF WASTE, LABOR, TIME AND COST [1-4]...

BACKGROUND: PHOSPHONATES HAVE IMPORTANT APPLICATIONS IN ORGANIC SYNTHESIS [1], AND BIOLOGICAL APPLICATIONS [2]. THEN, STABLE DERIVATIVES OF OXAPHOSPHAPHENANTHRENES WERE PREPARED USING OF DIALKYL ACETYLENEDICARBOXYLATE WITH 3-BROMO-2-NAPHTHOL IN THE PRESENCE OF TRIMETHYL OR TRIPHENYL PHOSPHITE IN GOOD YIELDS.METHODS: TO A MAGNETICALLY STIRRED SOLUTION OF DIALKYL ACETHYLENEDICARBOXYLATE (2 MMOL) AND 3-BROMO-2-NAPHTHOL (2 MMOL) IN 20 CM3 CH3CN WAS ADDED TRIPHENYL PHOSPHITE OR TRIMETHYL PHOSPHITE (2 MMOL) UNDER MICROWAVE CONDITIONS. THE REACTION MIXTURE WAS THEN STIRRED FOR 6H. AFTER COMPLETION OF REACTION (MONITORED BY TLC), THE MIXTURE OF REACTION WAS PURIFIED BY PREPARATIVE TLC ON SILICA GEL COLUMN CHROMATOGRAPHY USING N-HEXANE-ETOAC AS ELUENT TO GIVE PRODUCTS.RESULTS: THE RESULTS OF REACTION OF DIALKYL ACETYLENEDICARBOXYLATE 2, 3-BROMO-2-NAPHTHOL 1 AND TRIMETHYL OR TRIPHENYL PHOSPHITE LEADS TO 3-BROMO-4H-1-OXA-PHOSPHAPHENANTHRENE-3, 4-DICARBOXYLATE DERIVATIVES 4 IN EXCELLENT YIELDS.

A NOVEL Multicomponent NANOBIODEGRADABLE COMPOSITE CONSISTED CORN STARCH, HIGH DENSITY POLYETHYLENE (HDPE), LINEAR LOW DENSITY POLYETHYLENE (LLDPE) AND NANOCLAY CLOISITE 30B WERE PREPARED BY MELT MIXING. POLYETHYLENE GRAFTED MALEIC ANHYDRIDE (PE-G-MA) WAS USED AS A COMPATIBILIZER IN THIS COMPOSITES. THE RESULTS SHOWED THAT IN ADDITION 3% WT OF NANO CLAY IN THE COMPOSITES, A GOOD DISPERSION OF THE NANO PARTICLES AND A COMBINATION OF INTERCALATED AND NEARLY EXFOLIATED STRUCTURE WAS OBTAINED IN THE SAMPLE BY MICROSTRUCTURE STUDY OF X-RAY DIFFRACTION. MECHANICAL PROPERTIES OF THE BIO COMPOSITES SHOWED THAT THE TENSILE STRENGTH, YOUNG’S MODULUS AND ELONGATION AT BREAK INCREASE WHEN A CLOISITE 30B WAS USED AS A REINFORCEMENT. BIODEGRADATION STUDIED IN ACTIVATED SLUDGE SAMPLES WERE TESTED BY WEIGHT LOSS METHODS AND SCANNING ELECTRON MICROSCOPE (SEM) OBSERVED HOLES AND CRACKS ON THE SURFACES CAN BE CONSIDERED AS SIGNS OF THE SAMPLES BIODEGRADATION.

HETEROCYCLIC COMPOUNDS CONTAININGNITROGEN ARE VERY IMPORTANT BECAUSE OF THEIR BIOLOGICALLY AND PHARMACOLOGICAL ACTIVITIES [1].PHENAZONE IS A PAINKILLER, A TYPE OF MEDICATION USED TO RELIEVE PAIN. IT ALSO FUNCTIONS AS AN ANTI-INFLAMMATORY, ANTITUMOR, ANTI-MICROBIAL, ANTIVIRAL, AND ANALGESIC AND AN...