Patent ID: 7626019

Claim:
A compound of the formula (III) R 1 denotes a group selected from the group consisting of chlorine, fluorine, bromine, methanesulphonyl, ethanesulphonyl, trifluoromethanesulphonyl, para-toluenesulphonyl, CH 3 S(═O)— and phenylS(═O)—, R 2 denotes hydrogen or C 1 -C 3 -alkyl, R 3 denotes hydrogen or a group selected from the group consisting of optionally substituted C 1 -C 12 -alkyl, C 2 -C 12 -alkenyl, C 2 -C 12 -alkynyl and C 6 -C 14 -aryl, or a group selected from the group consisting of optionally substituted and/or bridged C 3 -C 12 -cycloalkyl, C 3 -C 12 -cycloalkenyl, C 7 -C 12 -polycycloalkyl, C 7 -C 12 -polycycloalkenyl, C 5 -C 12 -spirocycloalkyl and saturated or unsaturated C 3 -C 12 -heterocycloalkyl, which contains 1 to 2 heteroatoms, R 4 , R 5 which may be identical or different denote hydrogen or optionally substituted C 1 -C 6 -alkyl, or R 4 and R 5 together denote a 2- to 5-membered alkyl bridge, which may contain 1 to 2 heteroatoms.