Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus acids or salts thereof
Patent
1998-11-24
2000-01-04
Geist, Gary
Organic compounds -- part of the class 532-570 series
Organic compounds
Phosphorus acids or salts thereof
C07F 922
Patent
active
060111720
ABSTRACT:
The invention relates to a process for preparing alkali metal salts and/or alkaline earth metal salts of alkylphosphonous acids and dialkylphosphinic acids from elemental yellow phosphorus and alkyl halides, which comprises carrying out the reaction in the presence of aqueous alkali metal hydroxide or alkaline earth metal hydroxide or mixtures thereof. The invention likewise relates to the use of the compounds prepared by the process according to the invention for preparing flame retardants, extraction media and plant protection agents.
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"Superbase-Induced Generation of Phosphide and Phosphinite Ions as Applied in Organic Synthesis," B.A. Trofimov, N.K. Gusarova, S.F. Malysheva, T.N. Rakhmatulina and M.G. Voronkov, 1991, vol. 55, pp. 271-275.
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"Generation of Phosphide Anions From Phosphorus Red and Phosphine in Strongly Basic Systems to Form Organylphosphines and -Oxides," B. Trofimov, N. Gusarova, L. Brandsma, Phosphorus, Sulfur and Silicon, 1996, vol. 109-110, pp. 601-604.
"Alkylation of Phosphine Ph.sub.3 Generated from Red Phosphorus," D. Semenzin, G. Etemad-Moghadam, D. Albouy, and M. Koenig,; Tetrahedron Letters vol.35, No. 20, pp. 3297-3300, 1994.
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Kolbe Gunter
Stelzer Othmar
Weferling Norbert
Clariant GmbH
Geist Gary
Jackson Susan S.
Pfeiffer Hesna J.
Vollano Jean F
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