Patent ID: 8598363

Claim:
A process for manufacturing 2-[(3,5-difluoro-3′-methoxy-1,1′-biphenyl-4-yl)amino]nicotinic acid, which comprises the steps of: a) providing 3,5-difluoro-3′-methoxybiphenyl-4-amine, b) preparing and isolating an aminium salt of the 3,5-difluoro-3′-methoxybiphenyl-4-amine, and c) further reacting the aminium salt of 3,5-difluoro-3′-methoxybiphenyl-4-amine obtained in b) to obtain 2-[(3,5-difluoro-3′-methoxy-1,1′-biphenyl-4-yl)amino]nicotinic acid.