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1

2-Bromo-1-(1H-pyrazol-4-yl)ethanone: versatile precursors for novel mono-, bis- and poly{6-(1H-pyrazol-4-yl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazines}

Salem, Mostafa E., Darweesh, Ahmed F., Farag, Ahmad M., Elwahy, Ahmed H.M.

Journal:

Year:

2015

Language:

english

File:

PDF, 731 KB

english, 2015

2

Enhanced antibacterial activity of Egyptian local insects' chitosan-based nanoparticles loaded with ciprofloxacin-HCl

Marei, Narguess, Elwahy, Ahmed H.M., Salah, Taher A., El Sherif, Youssef, El-Samie, Emtithal Abd

Journal:

International Journal of Biological Macromolecules

Year:

2018

Language:

english

File:

PDF, 1.50 MB

english, 2018

3

Synthetic approaches toward macrocyclic sulfonyl crown formazans

Yehia A. Ibrahim, Ahmed H. M. Elwahy, Ashraf A. Abbas

Journal:

Heteroatom Chemistry

Year:

1996

Language:

english

File:

PDF, 389 KB

english, 1996

4

ChemInform Abstract: Synthetic Approaches Towards New Bisformazans and Bisverdazyls.

Ahmed H. M. Elwahy, Ashraf A. Abbas, Yehia A. Ibrahim

Journal:

Year:

1999

File:

PDF, 30 KB

1999

5

ChemInform Abstract: 3-Allylsalicylaldehyde and 3-Allylsalicylic Acid Derivatives: Synthesis and Conversion to Allyl-Crown Compounds as New Potential Precursors for Polymer Supported Crown Compounds.

Yehia A. Ibrahim, Ahmed H. M. Elwahy, Ashraf A. Abbas, Refaie M. Kassab

Journal:

Year:

2000

File:

PDF, 33 KB

2000

6

ChemInform Abstract: Difunctional Heterocycles: A Convenient Synthesis of Bis(4,5-dihydropyrazolyl) Ethers from Their Precursor Bis(chalcones).

Ahmed H. M. Elwahy

Journal:

Year:

2000

File:

PDF, 30 KB

2000

7

ChemInform Abstract: Synthesis of New Benzo-Substituted Macrocyclic Ligands Containing Pyridine or Triazole as Subcyclic Units.

Ahmed H. M. Elwahy, Ashraf A. Abbas

Journal:

Year:

2000

File:

PDF, 36 KB

2000

8

ChemInform Abstract: Synthesis of New Benzo-Substituted Macrocyclic Ligands Containing Quinoxaline Subunits.

Ahmed H. M. Elwahy

Journal:

Year:

2000

Language:

english

File:

PDF, 34 KB

english, 2000

9

ChemInform Abstract: Syntheses of Mono-, Di- and Triethynylazulenes.

Kai H. H. Fabian, Ahmed H. M. Elwahy, Klaus Hafner

Journal:

Year:

2000

File:

PDF, 31 KB

2000

10

ChemInform Abstract: Synthesis of Novel Benzene-Bridged Polyalkynylazulenes.

Ahmed H. M. Elwahy, Klaus Hafner

Journal:

Year:

2000

File:

PDF, 28 KB

2000

11

ChemInform Abstract: Bis(β-difunctional) Compounds: Versatile Starting Materials for Novel Bis(heterocycles).

Ahmed H. M. Elwahy, Ashraf A. Abbas

Journal:

Year:

2000

File:

PDF, 35 KB

2000

12

ChemInform Abstract: Allyl-Substituted Macrocyclic Crown Formazans: Promising Precursors for Polymer-Supported Macrocycles.

Ashraf A. Abbas, Ahmed H. M. Elwahy

Journal:

Year:

2001

File:

PDF, 33 KB

2001

13

ChemInform Abstract: Difunctional Heterocycles: A Convenient Synthesis of Bis(pyridinyl-2,3-dihydrooxadiazolyl)benzenes.

Ahmed H. M. Elwahy, Mohamed M. Ahmed, Mohamed El-sadek

Journal:

Year:

2001

File:

PDF, 29 KB

2001

14

New Trends in the Chemistry of Condensed Heteromacrocycles. Part A. Condensed Azacrown Ethers and Azathiacrown Ethers

Ahmed H. M. Elwahy

Journal:

Year:

2003

File:

PDF, 4 KB

2003

15

Synthesis of Novel Macrocyclic Di- and Tetralactams Containing Triazole Subunits.

Ahmed H. M. Elwahy, Ashraf A. Abbas, Refaie M. Kassab

Journal:

Year:

2003

File:

PDF, 100 KB

2003

16

New Trends in the Chemistry of Condensed Heteromacrocycles. Part B. Macrocyclic Formazans

Yehia A. Ibrahim, Ashraf A. Abbas, Ahmed H. M. Elwahy

Journal:

Year:

2004

File:

PDF, 51 KB

2004

17

Microwave Assisted Synthesis of Benzo-Substituted Macrocyclic Diamides and Their Corresponding Macrocyclic Dithiodiamides.

Ahmed H. M. Elwahy, Ghada S. Masaret

Journal:

Year:

2005

File:

PDF, 10 KB

2005

18

ChemInform Abstract: Synthesis of Novel Amide-Crownophanes and Schiff Base-Crownophanes Based on p-Phenylene, 2,6-Naphthalene, and 9,10-Anthracene.

Hussni A. Muathen, Nour A. M. Alowiny, Ahmed H. M. Elwahy

Journal:

Year:

2009

File:

PDF, 15 KB

2009

19

ChemInform Abstract: Synthesis of C-Pivot Lariat Ethers

Ashraf A. Abbas, Ahmed H. M. Elwahy

Journal:

Year:

2010

File:

PDF, 15 KB

2010

20

ChemInform Abstract: Synthesis of Trifluoromethyl-Substituted Fused Bicyclic Heterocycles and Their Corresponding Benzofused Analogues

Ahmed H. M. Elwahy, Mohamed R. Shaaban

Journal:

Year:

2011

File:

PDF, 20 KB

2011

21

ChemInform Abstract: Construction of Fused Heterocycles by Metal-Mediated [2 + 2 + 2] Cyclotrimerization of Alkynes and/or Nitriles

Mohamed R. Shaaban, Refat El-Sayed, Ahmed H. M. Elwahy

Journal:

Year:

2011

File:

PDF, 18 KB

2011

22

Ethynylazulenes — Building Blocks for Novel Oligoazulenes with Ethynyl and Butadiynyl Bridges

Kai H. H. Fabian, Ahmed H. M. Elwahy, Klaus Hafner

Journal:

European Journal of Organic Chemistry

Year:

2006

Language:

english

File:

PDF, 219 KB

english, 2006

23

Synthesis and Characterization of Novel Oligoazulenes with Mixed Ethynyl and Butadiynyl Bridges

Ahmed H. M. Elwahy, Klaus Hafner

Journal:

European Journal of Organic Chemistry

Year:

2006

Language:

english

File:

PDF, 136 KB

english, 2006

24

Cyclooligomerization of Mono- and Diazulenylethynes Catalyzed by Transition Metal Complexes

Ahmed H. M. Elwahy, Klaus Hafner

Journal:

European Journal of Organic Chemistry

Year:

2010

Language:

english

File:

PDF, 433 KB

english, 2010

25

Synthesis of novel macrocyclic di- and tetralactams containing triazole subunits

Ahmed H. M. Elwahy, Ashraf A. Abbas, Refaie M. Kassab

Journal:

Heteroatom Chemistry

Year:

2003

Language:

english

File:

PDF, 132 KB

english, 2003

26

Synthesis and rearrangement of triazinoquinazolines

Yehia A. Ibrahim, Ahmed H. M. Elwahy

Journal:

Heteroatom Chemistry

Year:

1994

Language:

english

File:

PDF, 327 KB

english, 1994

27

Stereospecific synthesis of 6,7-dihydro-5H-1,2,4-triazolo[3,4-b][1,3,4]thiadiazines

Yehia A. Ibrahim, Ahmed H. M. Elwahy, Ayman E. M. El-Fiky

Journal:

Heteroatom Chemistry

Year:

1994

Language:

english

File:

PDF, 319 KB

english, 1994

28

Synthesis of chromophoric bisazocrowndilactams

Yehia A. Ibrahim, Ahmed H. M. Elwahy, Gamal M. M. El-Kareish

Journal:

Heteroatom Chemistry

Year:

1995

Language:

english

File:

PDF, 319 KB

english, 1995

29

Synthesis of novel amide-crownophanes and Schiff base-crownophanes based on p-phenylene, 2,6-naphthalene, and 9,10-anthracene

Hussni A. Muathen, Nour A. M. Aloweiny, Ahmed H. M. Elwahy

Journal:

Journal of Heterocyclic Chemistry

Year:

2009

Language:

english

File:

PDF, 362 KB

english, 2009

30

Synthesis of C-pivot lariat ethers

Ashraf A. Abbas, Ahmed H. M. Elwahy

Journal:

Journal of Heterocyclic Chemistry

Year:

2009

Language:

english

File:

PDF, 1.66 MB

english, 2009

31

New trends in the chemistry of condensed heteromacrocycles Part A: Condensed azacrown ethers and azathiacrown ethers

Ahmed H. M. Elwahy

Journal:

Journal of Heterocyclic Chemistry

Year:

2003

Language:

english

File:

PDF, 426 KB

english, 2003

32

New trends in the chemistry of condensed heteromacrocycles part B: Macrocyclic formazans

Yehia A. Ibrahim, Ashraf A. Abbas, Ahmed H. M. Elwahy

Journal:

Journal of Heterocyclic Chemistry

Year:

2004

Language:

english

File:

PDF, 468 KB

english, 2004

33

Micowave assisted synthesis of benzo-substituted macrocyclic diamides and their corresponding macrocyclic dithiodiamides

Ahmed H. M. Elwahy, Ghada S. Masaret

Journal:

Journal of Heterocyclic Chemistry

Year:

2004

Language:

english

File:

PDF, 167 KB

english, 2004

34

A facile and efficient synthetic approach to novel lariat macrocyclic diamides and bis macrocyclic diamides

Ashraf A. Abbas, Ahmed H. M. Elwahy, Ahmed A. M. Ahmed

Journal:

Journal of Heterocyclic Chemistry

Year:

2005

Language:

english

File:

PDF, 152 KB

english, 2005

35

1,ω-Bis(4-amino-1,2,4-triazole-5(1H)-thion-3-ylsulfanyl)alkanes: Versatile precursors for novel bis(S-triazolo[3,4-b][1,3,4]thiadiazines) as well as novel bis(macrocyclic schiff bases)

Ahmed H. M. Elwahy, Ashraf A. Abbas, Ahmed A. M. Ahmed

Journal:

Journal of Heterocyclic Chemistry

Year:

2005

Language:

english

File:

PDF, 142 KB

english, 2005

36

Synthesis of novel benzo-substituted macrocyclic schiff bases containing two triazole rings

Ahmed H. M. Elwahy, Ghada S. Masaret

Journal:

Journal of Heterocyclic Chemistry

Year:

2007

Language:

english

File:

PDF, 599 KB

english, 2007

37

Synthesis of N-pivot lariat ethers

Ahmed H. M. Elwahy, Ashraf A. Abbas

Journal:

Journal of Heterocyclic Chemistry

Year:

2008

Language:

english

File:

PDF, 3.14 MB

english, 2008

38

Synthesis and molecular orbital calculations of some benzo-substituted macrocyclic diamides and their corresponding macrocyclic dithiodiamides

Adel A. Mohamed, Ghada S. Masaret, Ahmed H.M. Elwahy

Journal:

Year:

2007

Language:

english

File:

PDF, 485 KB

english, 2007

39

Construction of fused heterocycles by metal-mediated [2+2+2] cyclotrimerization of alkynes and/or nitriles

Mohamed R. Shaaban, Refat El-Sayed, Ahmed H.M. Elwahy

Journal:

Year:

2011

Language:

english

File:

PDF, 5.62 MB

english, 2011

40

Synthesis of the first tris(crown formazan)

Ahmed H.M. Elwahy, Ashraf A. Abbas

Journal:

Tetrahedron Letters

Year:

2006

Language:

english

File:

PDF, 104 KB

english, 2006

41

New synthesis of macrocyclic crown-formazans from pyruvic acid derivatives

Yehia A. Ibrahim, Ahmed H.M. Elwahy, Ashraf A. Abbas

Journal:

Year:

1994

Language:

english

File:

PDF, 704 KB

english, 1994

42

Synthesis of New Benzo-substituted Macrocyclic Ligands Containing Quinoxaline Subunits

Ahmed H.M. Elwahy

Journal:

Year:

2000

Language:

english

File:

PDF, 283 KB

english, 2000

43

Synthesis of New Benzo-substituted Macrocyclic Ligands Containing Pyridine or Triazole as Subcyclic Units

Ahmed H.M Elwahy, Ashraf A Abbas

Journal:

Year:

2000

Language:

english

File:

PDF, 283 KB

english, 2000

44

Metal mediated cyclooligomerization of mono- and diazulenylethynes

Ahmed H.M Elwahy, Klaus Hafner

Journal:

Tetrahedron Letters

Year:

2000

Language:

english

File:

PDF, 123 KB

english, 2000

45

Syntheses of mono-, di- and triethynylazulenes

Kai H.H Fabian, Ahmed H.M Elwahy, Klaus Hafner

Journal:

Tetrahedron Letters

Year:

2000

Language:

english

File:

PDF, 101 KB

english, 2000

46

Synthesis of novel benzene bridged polyalkynylazulenes

Ahmed H.M Elwahy, Klaus Hafner

Journal:

Tetrahedron Letters

Year:

2000

Language:

english

File:

PDF, 144 KB

english, 2000

47

A new approach for the design of novel hexa-host molecules

Ahmed H.M Elwahy

Journal:

Tetrahedron Letters

Year:

2001

Language:

english

File:

PDF, 90 KB

english, 2001

48

New π-systems from 1-ethynylazulene

Ahmed H.M. Elwahy

Journal:

Tetrahedron Letters

Year:

2002

Language:

english

File:

PDF, 132 KB

english, 2002

49

Photo-physical properties and amplified spontaneous emission of a new derivative of fluorescein

Hamdan A.S. Al-Shamiri, Maram T.H. Abou Kana, I.M. Azzouz, Ahmed H.M. Elwahy

Journal:

Optics Communications

Year:

2010

Language:

english

File:

PDF, 717 KB

english, 2010

50

Bis(α-bromo ketones): Versatile Precursors for Novel Bis(s-triazolo[3,4-b][1,3,4]thiadiazines) and Bis(as-triazino[3,4-b][1,3,4]thiadiazines)

Mohamed R. Shaaban, Ahmed H. M. Elwahy

Journal:

Journal of Heterocyclic Chemistry

Year:

2012

Language:

english

File:

PDF, 230 KB

english, 2012

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