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Digitale Medien

Syntheses of pure (9Z, 11Z), (9E, 11E), (9E, 11Z), and (9Z,11E)-9,11-hexadecadienals-possible candidate pheromones (1984)

Svirskaya, P. I. ; Maiti, S. N. ; Jones, A. J. ; [weitere]

Springer

Journal of chemical ecology 10 (1984), S. 795-807

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ISSN: 1573-1561

Schlagwort(e): (9z,11Z) ; (9E.11E) ; (9E,11Z) ; (9Z,11E)-9 ; 11-Hexadecadienals ; (9E)-hexadecen-11-yn-1-yl acetate ; syntheses ; aldehydes ; ester ; conjugated dienes ; dienals

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Chemie und Pharmazie

Notizen: Abstract The title compounds were prepared by six different routes, and recommendations are given for the more convenient procedures in laboratory-scale syntheses. Modifications in the literature preparations of the 9E,11E and 9E,11Z isomers are described. Baseline separation of a prepared mixture of all four isomers of the (9Z, 11Z), (9E, 11E), (9E, 11Z), and (9Z, 11E)-9,11-hexadecadienals was achieved using GC methods with standard capillary columns. [13C]NMR spectroscopy of the alkene carbon atoms clearly differentiates between theZ,Z, E,E and eitherE,Z orZ,E isomers of the precursor dienols and thus of the dienals.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00988544

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Digitale Medien

Phosphorus containing polymers. Part 5. Polyazoxyphosphonate (1994)

Banerjee, S. ; Palit, S. K. ; Maiti, S.

Springer

Colloid & polymer science 272 (1994), S. 1203-1207

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ISSN: 1435-1536

Schlagwort(e): Polyazoxyphosphonate ; XPS-L01 ; 31P-NMR ; Flame retardancy

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie , Maschinenbau

Notizen: Abstract A new polyazoxyphosphonate was synthesized by reaction of 4-4′-dihydroxyazoxybenzene and dichlorophenyl phospine oxide by interfacial polycondensation using a phase transfer catalyst. The polymer was characterized and the results obtained by various analytical techniques indicate that it is mostly amorphous, low molecular weight and soluble in organic solvents such as DMF, DMAC, NMP, etc. The high char residue (∼40%) and limiting oxygen index indicate flame retardancy of the polymer which is due to phosphorus. Thermal stability of this polymer is moderate. TheT g appears to be at 152°C.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00657771

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