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تاريخ البحث
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نوع البحث
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البحث
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م
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منفرد
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طريقة
مباشرة و انتقائية لتحضير مركبات 2ـ بروموـ 4ـ الكيل ـ ثيوفينات: باساليب ملائمة
لتحضير ثنائي هيكل ـ202 ـ ثنائي ثيوفينات كرأس ـ ذيل وذيل ـذيل.
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1
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منفرد
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"Reaction of
2-thiohydantoins with some diazoalkanes and some amines"
A. A. El-Barbary, Y. L. Aly, A. M. Hashem and A. A. El-Shehawy
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2
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منفرد
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"Alkylation of
thiohydantoins including synthesis, conformational and configurational
studies of some acetylated S-pyranosides"
Y. L. Aly, A. A. El-Barbary and A. A. El-Shehawy
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3
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منفرد
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. "Enantioselective
synthesis of homoallylamines by nucleophilic addition of chirally modified
allylboron reagents to imines"
S. Itsuno, K. Watanabe, K. Ito, A. A. El-Shehawy and A. A. Sarhan
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4
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منفرد
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. "Enantioselective
allylation of N-(trimethylsilyl)benzaldehyde imine using polymer-supported
chiral allylboron reagents"
A. A. El-Shehawy, M. Y. Abdelaal, K. Watanabe, K. Ito and S. Itsuno
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5
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منفرد
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. "Preparation of
both diastereomers
of homoallylic amines by allylmetalation of methyl
N-benzylidene-(S)-valinate"
A. A. El-Shehawy, M. A. Omara, K. Ito and S. Itsuno
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6
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منفرد
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"Enantioselective synthesis
of optically active homoallylamines by nucleophilic addition of chirally
modified allylboranes to N-silylimines"
S. Itsuno, K. Watanabe, T. Matsumoto, S. Kuroda, A. Yokoi and A. El-Shehawy
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7
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منفرد
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. "Synthesis of
novel chiral monomers by means of Umani-Ronchi-Savoia allylation and their
polymerization"
S. Itsuno and A. A. El-Shehawy
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8
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منفرد
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"Enantioselective
synthesis of chiral homoallyl alcohols and homoallylamines by nucleophilic
addition of an allylboron reagent modified by a polymer-supported chiral
ligand"
S. Itsuno, K. Watanabe and A. A. El-Shehawy
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9
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منفرد
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11. "Phase transfer
catalyzed reactions of crosslinked chloromethylated polystyrene with
vanillin"
A. A. Sarhan, A. A. El-Shehawy and M. Y. Abdelaal
Reactive & Functional
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10
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منفرد
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. "Michael addition
of activated nitriles to 4[(+)-camphor-10'-sulfonylamino]-acetophenone and
some of its chalcones"
A. A. El-Shehawy and A. M. E. Attia
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11
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منفرد
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. "Allylation of
aldiminomercaptotriazinones using allyl halides and allylmetal
compounds"
A. A. El-Shehawy
"
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12
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منفرد
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14. "Allylation of
some arylideneaminomercaptotriazinones using polymer-supported allylboron
reagents and analogous allylboration reaction of imine-supported resin"
A. A. El-Shehawy
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13
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منفرد
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15. "Synthesis of
novel bicycloalkane ring-fused pyridines via Michael addition reaction of a, b-unsaturated nitriles"
A. A. El-Shehawy, A. A. Ismail and A. M. Attia
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14
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منفرد
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16. "A convenient
method for the synthesis of 2-(b-D-glycopyranosylthio)
pyridines"
A. M. E. Attia and A. A. El-Shehawy
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15
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منفرد
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17. "Synthesis of
N1- and N3-quinazolin-3(H)-4-thione non-nucleosides"
A. A. Ismail, A. A. El-Shehawy and A. M. Attia
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16
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منفرد
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18. "Precise
synthesis and surface characterization of well-defined
chain-end-functionalized polystyrenes with two, four, eight, sixteen and
thirty-two perfluorooctyl groups"
K. Sugiyama, S. Sakai, A. El-Shehawy and A. Hirao
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17
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منفرد
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19. ""Precise
synthesis of novel chain-end-functionalized polystyrenes with a definite
number of perfluorooctyl groups and their surface characterization"
Ashraf A. El-Shehawy, Hideaki Yokoyama, Kenji Sugiyama, and Akira Hirao
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18
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منفرد
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20.
"Enantioselective diethylzinc addition to the exocyclic C=N double bond
of some 4-arylideneamino-3-mercapto-6-methyl-4H-1,2,4-triazin-5-one
derivatives"
Ashraf A. El-Shehawy
20. "Enantioselective diethylzinc addition to the exocycl
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19
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منفرد
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21. "Efficient dual
catalytic enantioselective diethylzinc addition to the exocyclic C=N double
bond of some 1,2,4-N-triazinylarylimines using polymer-supported chiral b-amino alcohols derived from
norephedrine"
Ashraf A. El-Shehawy
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20
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منفرد
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22. "Synthesis of
novel well-defined chain-end-functionalized polystyrenes with dendritic
chiral ephedrine moieties and their applications as highly enantioselective
diethylzinc addition to N-diphenylphosphinoyl arylimines"
Ashraf A. El-Sh
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21
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منفرد
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. "Application of
well-defined chain-end-functionalized polystyrenes with dendritic chiral
ephedrine moieties as highly catalytic enantioselective addition of
dialkylzinc reagents to aldehydes"
Ashraf A. El-Shehawy, Kenji Sugiyama and Akir
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22
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منفرد
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"Convenient
approaches for the synthesis and characterization of well-defined linear-dendritic
diblock copolymers having a definite number of peripheral primary amino
groups: Exact control of numbers introduced and dendritic distribution to
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23
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منفرد
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. "A selective and
direct synthesis of 2-bromo-4-alkylthiophenes: Convenient and straightforward
approaches for the synthesis of head-to-tail (HT) and tail-to-tail (TT)
dihexyl-2,2`-bithiophenes"
Ashraf A. El-Shehawy, Nabiha I. Abdo, Ahmed
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24
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منفرد
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. "Alternating
copolymers based on 2,1,3-benzothiadiazole and hexylthiophene: positioning
effect of hexyl chains on the photophysical and electrochemical
properties"
Ashraf A. El-Shehawy, Nabiha I. Abdo, Ahmed A. El-Barbary, Jae Suk Lee
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25
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منفرد
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"5-Anthracenylidene- and 5-(4-benzyloxy-3-methoxy)benzylidene-hydantoin,
2-thio-hydantoin derivatives, synthesis and S-alkylation"
Youssef L. Aly, Ashraf A. El-Shehawy, Adel M. Attia and Mohmed E. Sobh
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26
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