Patent ID: 8415476

Claim:
An intermediate of formula (II) where R c is hydroxy, amino, di-(C 1 -C 3 )alkyl-amino, tri-(C 1 -C 3 )alkyl-ammoniomethyl, nitro, trifluoromethyl, nitrile, CH 3 C(O)NH, CH 3 SO 2 NH, CH 3 SO 2 , R′R″NSO 2 , where R′ and R″ are H, or linear or branched C 1 -C 6 alkyl, R d is H, hydroxy, amino, di-(C 1 -C 3 )alkyl-amino, tri-(C 1 -C 3 )alkylammoniomethyl, nitro, trifluoromethyl, nitrile, CH 3 C(O)NH, CH 3 SO 2 NH, CH 3 SO 2 , R′R″NSO 2 , where R′ and R″ are H, or linear or branched C 1 -C 6 alkyl.