Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Badreldin Ibrahim"'
Publikováno v:
Journal of Nutrition Education and Behavior. 50:102-103
Publikováno v:
In Journal of Nutrition Education and Behavior January 2018 50(1):102-103
Publikováno v:
J. Chem. Soc., Perkin Trans. 2. :1537-1542
Noise-decoupled pulsed Fourier transform 13C n.m.r. spectra reveal the tacticity in poly(vinyl acetate) and the monomer sequence distribution (MSD) in ethylene (E)–vinyl acetate (V) copolymers. Assignments of carbon absorptions were made from 13C
Publikováno v:
In Journal of Nutrition Education and Behavior January 2014 46(1):88-88
Publikováno v:
ChemInform. 19
Cycloaddition of dimethyl acetylenedicarboxylate with a variety of 1-substituted 3-oxidopyridinium betaines yields novel furan cycloadducts. Methyl phenylpropiolate reacts similarly with the activated 1-[1′,2-di(p-nitrophenyl)vinyl]-3-oxidopyridini
Publikováno v:
Chemischer Informationsdienst. 6
Frontier M.O. theory rationalises the effects of aza-substitution on the dimerisation tendency in 3-oxidopyridiniums, the 1-(2-pyrimidinyl) betaine displaying the predicted high reactivity; fulvenes add as 6 π-electron systems across the 2,6-positio
Autor:
Masood Parvez, George Iskander, Keith J. Fisher, George Ferguson, Badreldin Ibrahim, C. Y. Ishag
Publikováno v:
Chemischer Informationsdienst. 16
Autor:
Alan R. Katritzky, George Ferguson, Badreldin Ibrahim, C. Y. Ishag, Keith J. Fisher, Masood Parvez, George Iskander
Publikováno v:
Chemischer Informationsdienst. 15
Cycloaddition of dimethyl acetylenedicarboxylate with betaines such as 1-phenyl-3-oxidopyridinium does not yield the expected bicyclic product; instead, addition occurs at the exocyclic oxygen atom and ring carbon 2 of the betaine, with concomitant o
Publikováno v:
Chemischer Informationsdienst. 7
Publikováno v:
Chemischer Informationsdienst. 5
The betaine 1-(5-nitro-2-pyridyl)-3-oxidopyridinium reversibly forms a dimer which provides a convenient source of the reactive betaine monomer; olefinic dipolarophiles add readily at the 2,6-positions, 2,3-dimethylbutadiene reacts across the 2,4-pos