Process for the preparation of tertiary phosphine oxides
AssigneeHoechst Aktiengesellschaft
InventorHans-Jerg Kleiner
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Abstract
Tertiary phosphine oxides are obtained by adding olefins having a terminal hydroxy or amino group or functional derivatives thereof to secondary phosphine oxides. The adducts are useful as intermediates in the preparation of flame-retardant agents, anti-corrosive agents, pesticides, pharmaceuticals and detergents.
Claims6
A compound of the formula ##STR11## in which R.sub.1 and R.sub.2 are alkyl of 1 to 12 carbon atoms, n is 3, and R is
- --NR.sub.4 R.sub.5
- in which R.sub.4 is hydrogen, and R.sub.5 is hydrogen.
A compound of the formula ##STR12## in which R.sub.1 and R.sub.2 are cycloalkyl of 4 to 8 carbon atoms, n is 3, and R is
- --NR.sub.4 R.sub.5
- in which R.sub.4 is hydrogen, and R.sub.5 is hydrogen.
A process for the preparation of a compound ##STR13## in which R.sub.1 and R.sub.2 are alkyl of 1 to 12 carbon atoms, n is 3, and R is
- --NR.sub.4 R.sub.5
- in which R.sub.4 is hydrogen, and R.sub.5 is hydrogen, and which comprises reacting a dialkyl phosphine oxide of the formula ##STR14## wherein R.sub.1 and R.sub.2 are as defined above, with an olefin of the formula
- H.sub.2 C .dbd. CH -- CH.sub.2 -- NH.sub.2
- wherein R and n have the above meanings, in the presence of a catalytic amount of a free radical-forming agent at a temperature between 80.degree. and about 180.degree. C.
Dependencies are inferred from the claim text.