Patent ID: 8063226

Claim:
A process for preparing 2-aminopyridine derivative of the general formula II comprising reacting an open-chain nitrile precursor I or III with a nitrogen compound in a cyclization reaction: where the substituents R 1 to R 6 and R f are each defined as follows: R f : C n H (2n+1−m) X m X: F, Cl, Br, where X is identical or different when m>1 n: positive integer from 1 to 4; m: positive integer from 1 to 2n+1 R 1 : hydrogen, C1-C4-alkyl, or C6-aryl, R 2 : hydrogen or a protecting group for alcohols R 3 ,R 6 : C1-C4-alkyl, R 4 ,R 5 : hydrogen, R: C1-C8-alkyl, C6-C14-aryl, C1-C13-heteroaryl.