Patent ID: 8642778

Claim:
A compound of formula III Kt + [Y(CHR a ) n —CH(R a )SO 3 ] − III wherein R a is H, or C 1-12 -alkyl; R b is C 1-12 -alkyl; n is 3; Kt + is a non-metallic cation or K + , Na + , Rb + , or Cs + ; Y is F, Cl, Br, R b —C(O)O or Nu; Nu is OR o OAr, SR o , SAr, NHR o , N(R o ) 2 , CH(COOR o ) 2 , P(R o ) 2 , P(Ar) 2 , or P(O)(OR o ) 2 ; R o is C 1-12 -alkyl; and Ar is an unsubstituted or substituted aromatic ring.