درست بعض الخواص الفيزيائية و الطيفية للمرتبطتين و المعقدات المصطنعة بواسطة
تقانات مطيافية الأشعة تحت الحمراء و الطنين النووي المغناطيسي البروتوني و الكربوني،
إضافة إلى التحليل العنصري، إذاً بينت نتائج هذه الدراسة أنها كانت متفقة مع الصيغ
التركيبية و البنى المقترحة لهذه المعقدات.
The Reaction of Glycerol carried out with tow aryl halides
under basic conditions (K2CO3) using 5 mol% of Pd(II)Complex as
catalyst, Pd(PPh3)2Cl2. The typical reaction has been performed
between glycerol and bromobenzene. This reaction is achieved
in
water as solvent. However, the catalyst complex does not dissolve
in aqueous solutions rather it acts as heterogeneous catalyst.
Therefore, it is filtrated at the end of the reaction and reused several
times. Accordingly, new compound were prepared by reacting
glycerol with 1-bromo-2,6-dichlorobenzene. It is anticipated that the
synthesized compounds may have pharmaceutical application.
Phenol derivatives have been reacted with aryl halides under
heterogeneous basic catalyst (Amberlyst-21) using 5 mol% Cu(I)
Complex as catalyst, [CuClPPh3]4. The typical reaction has been
performed between p-cresol and bromobenzene. This reaction
is
achieved in o-xylene as solvent. However, the catalyst complex
does not dissolve in toluene rather it acts as heterogeneous catalyst.
Therefore, it is filtrated at the end of the reaction and reused several
times. Accordingly, new compounds were prepared by reacting one
of the bromoaryl derivatives with paracetamol. It is anticipated that
the synthesized compounds may have pharmaceutical application as
non-steroidial anti-inflammatory drugs (NSAIDs).
In this work, three new compounds of benzoxazine monomers were
synthesized based on (phenol, hydroquinone, 2-naphthol) and
triethoxysilyl propyl amine (TESPA) and paraformaldehyde. (TESPA)
were used to study its effect on the thermal stability of
polybenzoxazine
resulting from the ring opening polymerization of prepared monomers.
In this work the electrochemical behavior of Para-nitro aniline
and metoxy benzealdehyde was studied by cyclic voltammetric
method on glassy carbon electrode in alkaline medium . It was
found that the Para- nitro aniline needed five electrons to reduce to
the azo group.
In this paper, the chemical structure of chitosan has been
modified by trans esterification reaction with methyl esters both of
octanoic and dodecanoic acid, using potassium carbonate as a based
catalyst, the degree of substitution has been determ
inated to change
hydrophilic properties, Some physical properties of trans
esterification products has been determined by measuring the
Kinematic viscosity, degree of turbidity and density of their water
solutions.
In this research two Indomethacin derivatives were
synthesized, Indomethacin ethyl ester was synthesized by
The Direct Esterification method by reacting indomethacin
with ethanol within different conditions of time, molar
ratios and solvents in a
cidic medium using homogeneous
acid catalysts such as sulfuric acid and methane sulfuric
acid and heterogeneous acid catalysts such as amberlyst-
15. Then indomethacin acid hydrazide was synthesized by
condensing the previous ester with hydrazine hydrate and
the best conditions were studied of time, molar ratios,
solvents and different temperatures without using any
catalyst.
In this paper, the chemical structure of pectin has been
modified by reacting of carboxyl group in pectin with tetrabutyl
ammonium hydroxide [TBA-OH], (acid-base) reaction, to change
hydrophilic properties by adding hydrophobic alkyl chains to the
polymer chain in pectin, Some physical properties of both: pectin
and tetrabutyl ammonium pectin; has been determined by
measuring the Kinematic viscosity, degree of turbidity and density
of their water solutions at different concentration.
This work represent synthesis of new benzoxazines polymers based on
either phenol or hydroquinone as a phenolic compounds and para
aminophenol as primary amine and paraformaldehyde.
In this research, we have used eco-friendly method to prepare four derivatives of 1,2,4-triazole Esters by using the following general nucleophilic substitution reaction.
