Patent ID: 8765992

Claim:
A method for preparing a compound of following General Formula (I b ): wherein: X a1 , X a2 , X a3 , X a4 , and X a5 , identical or different, are a hydrogen atom, a halogen atom, a R a or G a -R a group; R a is an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkyloxy, an alkylthio, or a heterocyclic group, said group can be substituted or not, or R a is a protecting group linked to the phenyl ring by an oxygen atom or sulfur atom; L is a CO—R L or R L —CO group; X b1 , X b2 , X b3 , X b4 , and X b5 are substituent groups, wherein one of them is a R′ b -G b -R c or G b -R c group, and at least one of other substituent groups adjacent to said R′ b -G b -R c or a G b -R c group is a halogen atom or a R″ b group, the remaining groups being independently hydrogen atoms, halogen atoms or R″ b groups; R″ b is an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkyloxy, an alkylthio, or a heterocyclic group, said group can be substituted or not, or R″ b is a protecting group linked to the phenyl ring by an oxygen atom or sulfur atom; R′ b is an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkyloxy, an alkylthio, or a heterocyclic group, said group can be substituted or not; R L is an unsubstituted or substituted alkyl or alkenyl group; G a and G b , identical or different, are an oxygen atom or sulfur atom; R c is an alkyl group substituted by at least a —COOR d group, wherein R d is an unsubstituted alkyl, alkenyl, aryl, cycloalkyl, or heterocyclic group; said method comprising the following steps: a) obtaining the compound of General Formula (I a ): wherein: X a1 , X a2 , X a3 , X a4 , X a5 , L, R a , R′ b , R″ b , R L , G a , and G b group are defined above; and X b1 , X b2 , X b3 , X b4 , and X b5 are substituent groups wherein one of them is a R′ b -G b -H or G b -H group, and at least one of the substituent groups adjacent to said R′ b -G b -H or G b -H group is a halogen or a R″ b group, the remaining groups being independently hydrogen atoms, halogen atoms or R″ b groups; b) contacting the compound of General Formula (I a ) with a sulfonic acid derivative of General Formula (II) R s —SO 2 —O—R c , in a biphasic organic solvent/water medium, and in presence of a compound of General Formula (III): in which: R s , R t1 , R t2 , R t3 , and R t4 , identical or different, are unsubstituted alkyl groups; A is a nitrogen or phosphorus atom; X c is an halogen, HSO 4 , or H 2 PO 4 ; and R c is defined as for General Formula (I b ).