Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Mohamed Rifaat Hamza Elmoghayar"'
Publikováno v:
Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry. 17:1-13
1-Cyanoacety1-4-cinnamoylthiosemicarbazide and its complexes of the bivalent metal ions Cu(II), Ni(II), Co(II), Pb(II) and Hg(II) have been synthesised and characterized. Probable structures for the complex compounds have been proposed on the basis o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4ce5a27e071ff97d57824995504d14a
https://doi.org/10.1080/00945718708059408
https://doi.org/10.1080/00945718708059408
Publikováno v:
Synthesis. 1984:1-26
Revue des methodes de preparation, des etudes structurales et de la reactivite des oxo-3 alcanenitriles. Ces composes sont des intermediaires importants pour la synthese d'une variete de systemes heterocycliques difficilement accessibles par d'autres
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d99ec34db8def797f5b855aa2a8a99af
https://doi.org/10.1055/s-1984-30717
https://doi.org/10.1055/s-1984-30717
Autor:
Mohamed Ahmed Ibrahim, Mohamed Hilmy Elnagdi, Mohamed Rifaat Hamza Elmoghayar, Mohamed Mohamed Mohamed Sallam
Publikováno v:
Helvetica Chimica Acta. 60:2171-2176
The Carbo(3-phenylpyrazol-5-yl-hydrazonoyl) halides 1a,b react with active methylene compounds to yield the 1-(3-phenylpyrazol-5-yl)-pyrazole derivatives 2a–k (Scheme 1). The acyclic intermediates 3a,b could be isolated from reaction of 1a,b with a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b185564b61b33829d29411f973675661
https://doi.org/10.1002/hlca.19770600709
https://doi.org/10.1002/hlca.19770600709
Publikováno v:
Monatshefte f�r Chemie Chemical Monthly. 115:1413-1419
3-Antipyrinyl-5-aminopyrazole (1) reacted with acrylonitrile to afford 5-amino-1-β-cyanoethyl-3-antipyrinylpyrazole (2). Compound2 could also be obtained from the reaction of β-cyanoethylhydrazine (3) and compound4.2 was readily cyclized into 2-ant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b239b0b5875e10d73e74a46d1e3df7b
https://doi.org/10.1007/bf00816340
https://doi.org/10.1007/bf00816340
Autor:
Mohamed Hilmy Elnagdi, Mohamed Kamal Ahmed Ibraheim, Hikmat Hussein Alnima, Shereif Mahmoud Fahmy, Mohamed Rifaat Hamza Elmoghayar
Publikováno v:
Zeitschrift für Naturforschung B. 33:216-219
3-Phenylpyrazole-5-diazonium chloride (2) couples with benzoylacetonitrile and with phenacylthiocyanate to yield the corresponding hydrazone derivatives 3 a, b. Whereas 3 a cyclised into the pyrazolo[1,5-c]-as-triazine derivative (4a) upon treatment
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7a478f7cc10304a5799adc07f283e68
https://doi.org/10.1515/znb-1978-0220
https://doi.org/10.1515/znb-1978-0220
Publikováno v:
Tetrahedron. 31:63-67
β-Cyanoethylhydrazine 1 reacts with benzoylacetonitrile 2 in refluxing ethanol to yield 5-amino-1-β-cyanoethyl-3-phenylpyrazole 4 ; in acetic acid acetyl-β-cyanoethylhydrazone 8 was obtained. Compounds 4 and 8 were readily cyclized into 2-phenyl-4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ce3375ac2a9d47d6e947767c42d9666
https://doi.org/10.1016/0040-4020(75)80011-1
https://doi.org/10.1016/0040-4020(75)80011-1
Publikováno v:
Monatshefte f�r Chemie Chemical Monthly. 117:201-204
The reactivity of β-cyanoethylhydrazine toward enaminonitrile and aroyl isothiocyanates is reported. A variety of 3,5-diaminopyrazole and Δ3-1,2,4-triazolin-5-thione derivatives could be prepared.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6afd6a9eb81a1cdd8f31e34eefd0815e
https://doi.org/10.1007/bf00809440
https://doi.org/10.1007/bf00809440
Publikováno v:
Zeitschrift für Naturforschung B. 32:307-310
The behaviour of 3,5-diamino-4-phenylazopyrazole (1) toward isothiocyanates, acrylonitrile and ethyl ethoxymethylenecyanoacetate is investigated. An improved synthesis of 4-unsubstituted-3,5-diaminopyrazoles by an arylazo removal reaction is also rep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25ebc73917bd7f0a9a6286e506545b9e
https://doi.org/10.1515/znb-1977-0315
https://doi.org/10.1515/znb-1977-0315
Publikováno v:
Journal f�r Praktische Chemie. 330:657-660
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0712f19a14d01868aac4ff35e05eca1d
https://doi.org/10.1002/prac.19883300424
https://doi.org/10.1002/prac.19883300424
Publikováno v:
Archiv der Pharmazie. 316:76-82
4-Acetylantipyrine (1) was condensed with aromatic or heterocyclic aldehydes to yield the cinnamoylidene derivatives 4a—d. Compound 4b was converted into the pyrazolinylantipyrine derivative 9 by hydrazine hydrate. 4-(Chloroacetyl)antipyrine (2) re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49cbcb68d888cb9f082f0d4fb3b6d2b6
https://doi.org/10.1002/ardp.19833160115
https://doi.org/10.1002/ardp.19833160115