Process for Preparing Ethylenedialkylphosphinic Acids, Esters and Salts by Means of Acetylene and Use Thereof
申请人:Hill Michael
公开号:US20110251312A1
公开(公告)日:2011-10-13
The invention relates to a process for preparing ethylenedialkylphosphinic acids, ethylenedialkylphosphinic esters and ethylenedialkylphosphinic salts, characterized in that a) a phosphinic acid source (I) is reacted with olefins (IV) in the presence of a catalyst A to give an alkylphosphonous acid, its salt or ester (II), b) the resultant alkylphosphonous acid, its salt or ester (II) is reacted with an acetylenic compound (V) in the presence of a catalyst B, to give the ethylenedialkylphosphinic acid derivative (III), where R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
11
, R
12
, R
13
and R
14
are identical or different and independently of one another inter alia are H, C
1
-C
18
-alkyl, C
6
-C
18
-aryl, C
6
-C
18
-aralkyl, C
6
-C
18
-alkylaryl and X is H, C
1
-C
18
-alkyl, C
6
-C
18
-aryl, C
6
-C
18
-aralkyl, C
6
-C
18
-alkylaryl, Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Cu, Ni, Li, Na, K and/or a protonated nitrogen base, and the catalyst A comprises transition metals and/or transition-metal compounds and/or catalyst systems which are composed of a transition metal and/or a transition-metal compound and at least one ligand, and the catalyst B comprises peroxide-forming compounds and/or peroxo compounds and/or azo compounds.