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7. CARBAMOYL AND THIOCARBAMOYL DERIVATIVES OF N-BENZYL-AMINOMETHYL-DIMETHYL-PHOSPHINE OXIDE.

Author

Tashev, Emil, Lachkova, Viktoria, Keck, Helmut, Shenkov, Stoycho, Kläui, Wolfgang, and Varbanov, Sabi

Subjects
PHOSPHINE, PHOSPHORUS, OXIDES, ISOCYANATES, INORGANIC chemistry
Abstract

A series of thirteen new carbamoyl and thiocarbamoyl derivatives of N-benzyl-aminomethyl-dimethyl-phosphine oxide have been synthesized and characterized. The compounds were prepared via interaction of N-benzyl-aminomethyl-dimethyl-phosphine oxide with the corresponding isocyanates or isothiocyanates. The composition of the synthesized novel compounds was proved by elemental analysis for nitrogen and the structures were confirmed by IR,1H-,31P-31P{1H}NMR spectroscopy and by mass spectrometry. [ABSTRACT FROM AUTHOR]

Published
2004
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8. Synthesis of octa(1,1,3,3-tetramethylbutyl)octakis (dimethylphosphinoylmethyleneoxy)calix[8]arene and its application in the synergistic solvent extraction and separation of lanthanoids

Author

Tashev, Emil, Atanassova, Maria, Varbanov, Sabi, Tosheva, Tania, Shenkov, Stoycho, Chauvin, Anne-Sophie, and Dukov, Ivan

Subjects
Ions, 4-Benzoyl-3-methyl-1-phenyl-5-pyrazolone, Complexes, Lanthanoids, Mixtures, Aliquat-336, Phosphorus-containing calix[8]arene, Trivalent Lanthanoids, Lanthanides, Synergistic solvent extraction, Rim, Calixarenes, Phosphinoyl Pendant Arms
Abstract

A new lower rim substituted calix[8]arene bearing eight phosphine oxide moieties has been synthesized. The structure of 5,11,17,23,29,35,41,47-octa(1,1,3,3-tetramethylbutyl)-49,50,51,52,53,54,55,56-octakis(dimethylphosphinoylmethyleneoxy)calix[8]arene (S) was identified and confirmed by elemental analysis, IR-, H-1, C-13 and P-31-{H-1} NMR spectroscopy as well as by ES-mass spectrometry.

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