أ.د/اشرف عبدالحميد عبدالحميد الشهاوى
          
 
الأبحاث العلمية

تاريخ البحث

نوع البحث

البحث

م


منفرد

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.

1


منفرد

"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

2


منفرد

"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

3


منفرد

. "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

4


منفرد

. "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

5


منفرد

. "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

6


منفرد

"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

7


منفرد

. "Synthesis of novel chiral monomers by means of Umani-Ronchi-Savoia allylation and their polymerization"
S. Itsuno and A. A. El-Shehawy

8


منفرد

"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

9


منفرد

11. "Phase transfer catalyzed reactions of crosslinked chloromethylated polystyrene with vanillin"
A. A. Sarhan, A. A. El-Shehawy and M. Y. Abdelaal
Reactive & Functional

10


منفرد

. "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

11


منفرد

. "Allylation of aldiminomercaptotriazinones using allyl halides and allylmetal compounds"
A. A. El-Shehawy
"

12


منفرد

14. "Allylation of some arylideneaminomercaptotriazinones using polymer-supported allylboron reagents and analogous allylboration reaction of imine-supported resin"
A. A. El-Shehawy

13


منفرد

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

14


منفرد

16. "A convenient method for the synthesis of 2-(b-D-glycopyranosylthio) pyridines"
A. M. E. Attia and A. A. El-Shehawy

15


منفرد

17. "Synthesis of N1- and N3-quinazolin-3(H)-4-thione non-nucleosides"
A. A. Ismail, A. A. El-Shehawy and A. M. Attia

16


منفرد

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

17


منفرد

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

18


منفرد

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

19


منفرد

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

20


منفرد

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

21


منفرد

. "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

22


منفرد

"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

23


منفرد

. "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

24


منفرد

. "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

25


منفرد

. "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

26

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