Zobrazeno 1 - 6
of 6
pro vyhledávání: '"David E. Rajsfus"'
Publikováno v:
Journal of Fluorine Chemistry. 148:59-66
Fluorination should impart greater thermal-oxidative stability to the versatile norbonenyl system. Anti-7-Fluoronadic and 7,7-difluoro nadic acid esters (5-norbornenyl-2-endo,3-endo-acid esters) 5c and 5d were synthesized as precursors for a variety
Publikováno v:
Journal of Fluorine Chemistry. 148:49-58
In an attempt to improve the thermo-oxidative stability of aerospace polyimides, we have explored the preparation of 7-fluorinated nadic endcaps. The latter are 5-norbonenyl acid esters in a 2-endo,3-endo configuration, which is required for imidizat
Autor:
Keren Keinan-Adamsky, Aryeh A. Frimer, Hugo E. Gottlieb, David E. Rajsfus, Pessia Gilinsky-Sharon, Pinchas Aped, Vered Marks
Publikováno v:
Magnetic Resonance in Chemistry. 50:672-679
The nitration of tetraiodoethylene (7) yields 1,1-diiodo-2,2-dinitroethylene (8). The latter reacts with alkylamines 9 or alkyldiamines 11 to give the corresponding acyclic 1,1-diamino-2,2-dinitroethylenes 10 or their cyclic analogs 12, respectively.
Publikováno v:
Journal of Fluorine Chemistry. 132:339-347
Fluorinated norbornenes are very desirable monomers in the semiconductor and high-temperature polyimide industries. We describe herein a synthetic strategy for the stereospecific mono- or difluorination of the C7-carbon in norbornene systems beginnin
Autor:
Pessia, Gilinsky-Sharon, Hugo E, Gottlieb, David E, Rajsfus, Keren, Keinan-Adamsky, Vered, Marks, Pinchas, Aped, Aryeh A, Frimer
Publikováno v:
Magnetic resonance in chemistry : MRC. 50(10)
The nitration of tetraiodoethylene (7) yields 1,1-diiodo-2,2-dinitroethylene (8). The latter reacts with alkylamines 9 or alkyldiamines 11 to give the corresponding acyclic 1,1-diamino-2,2-dinitroethylenes 10 or their cyclic analogs 12, respectively.
Publikováno v:
ChemInform. 42
A series of norbornenes of type (II), (IV), and (VI), which are mono- or difluorinated at the C7 bridge, are prepared using DAST as fluorinating agent.