申请人:——
公开号:US20040087554A1
公开(公告)日:2004-05-06
The invention relates to a method of producing the 1-hydroxy-1,1-diphosphonic acid compounds of general formula (I), and/or the pharmacologically acceptable salts thereof, in which formula R
1
represents hydrogen, OH, NO
2
, Cl, F, Br, C
1
-C
6
alkyl that may be substituted with halogen, amine and/or aminoalkyl, C
1-6
alkoxy, aryl, heteroaryl, a group NR
3
R
4
, wherein R
3
and R
4
may be the same or different and represent hydrogen, C
1
-C
6
alkyl, halogen-substituted alkyl, hydroxy-C
1
-alkyl; R
2
represents hydrogen, halogen, amine that may be substituted, C
1
-C
6
alkyl that may be substituted with halogen, amine and/or aminoalkyl, C
1
-C
6
alkoxy, aryl, heteroaryl; Y represents O, S or NH; Z represents C
1
-C
5
alkylene that may be substituted with amine groups, and m and n are 0 or 1, with the proviso that if n=1, m=1. According to the inventive method, a compound of formula (II), wherein R
1
, R
2
, Y, Z, m and n are defined as above, is reacted with a compound of the formula P(OSiR
5
3
)
3-p
R
6
p
, wherein R
5
represents a C
1
-C
4
alkyl group, R
6
represents a C
1
-C
6
alkyloxy group, and p is 0, 1 or 2. The reaction product is hydrolyzed in a manner known pre se and is optionally converted to the corresponding salts.