| 摘要 |
The invention relates to a process for the preparation of 2-N-acylaminopyridines of formula (1), where R1 and R5 = an alkyl group, a cycloalkyl group, an aryl group or a heteroaryl group, R2, R3 and R4 = hydrogen, an alkoxy group, an aryl group, a heteroaryl group, an alkyl group or a cycloalkyl group and R1 and R2 can together form a cycloalkyl group, which are prepared by treating a 5-oxoalkanenitrile oxime of formula (2), where R1 through R4 have the meanings given above, in the presence of a strong acid, with an acylating agent that contains at least on R5 group with the meaning given above. The invention moreover relates to a process for the preparation of 2-aminopyridines of formula (3), where R1 through R4 have the meanings given above, from said 2-N-acylaminopyridines. The invention moreover relates to the 5-oxoalkanenitrile oximes of formula (2), including those where R1 = H and R2 is an acyl group, the 2-N-acylaminopyridines of formula (1), and the 2-aminopyridines of formula (3). |
