Patent ID: 11884643
Assignee: BAYER AKTIENGESELLSCHAFT
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  A | IPC A  C

Claim 13:
14. A compound of formula (XXVIa) or (XXVIb):, wherein
R1 or R2 is a bromine atom or a chlorine atom;
R3 is a fluorine atom, a chlorine atom, a bromine atom, an iodine atom or a methyl; and
U1a is an hydroxy group or a C1-C6-alkoxy group;
provided that the compound of formula (XXVIa) does not represent:
ethyl 5-amino-4-bromo-3-methylthiophene-2-carboxylate [851443-15-7]; and

provided that the compound of formula (XXVIb) does not represent:
ethyl 4-amino-3,5-dibromothiophene-2-carboxylate [1394375-09-7].