Process for the manufacture of 2-halo-ethane-phosphonic acid dih

Details Process for the manufacture of 2-halo-ethane-phosphonic acid dih Process for the manufacture of 2-halo-ethane-phosphonic acid dih

1974-11-18

1977-03-22

Love, Ethel G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2605024R, C07F 938

Patent

active

040137155

ABSTRACT:
2-Halo-ethane-phosphonic acid dihalides and vinyl-phosphonic acid dihalides are prepared by reacting hydroxyethane-phosphonic acid, its salts or functional derivatives, or the mono-thio-analogs thereof with acid halides of the formula (CO).sub.1 or 2 X.sub.2 wherein X represents halogen using as catalyst a compound containing at least one three- to penta-valent nitrogen or phosphorus atom bound by at least 3 valences to organic radical having up to 20 carbon atoms, two of the valences possibly forming a double bond; a one- to three-basic organic or inorganic fully amidated acid of three or penta-valent phosphorus the nitrogen atoms of which are alkylated by aliphatic radicals having up to 20 carbon atoms and the organic radical of which contains up to 20 carbon atoms, or a mixture of the aforesaid compounds. If desired the reaction is carried out in an inert solvent, preferably the reaction product and in the presence of a polymerization inhibitor.

REFERENCES:
patent: 3200145 (1965-08-01), Lutz et al.
patent: 3574735 (1971-04-01), Sennewald et al.
patent: 3776953 (1973-12-01), Maier
patent: 3943170 (1976-03-01), Kleiner
patent: 3962324 (1976-06-01), Kleiner

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