| 摘要 |
<p>A method for preparing certain 5,11-dihydro-6H-dipyrido(3,2-b:2',3'-e][1,4]diazepines which comprises the following steps: 1. converting a 2,6-dichloro-3-pyridinecarboxamide to a 2,6-dichloro-3-aminopyridine by Hofmann Rearrangement; 2. reacting the 2,6-dichloro-3-aminopyridine with a 2-chloronicotonic acid to produce a 2,6-dichloro-3-(2'-chloro-3'-nicotinyl)carboxamidopyridine; 3. reacting the 2,6-dichloro-3-(2'-chloro-3'-nicotinyl) carboxamidopyridine with an amine to produce a 2,6-dichloro-3-(2'-amino-3'-nicotinyl)carboxamidopyridine; and 4. hydrogenating the 2,6-dichloro-3-(2'-amino-3'-nicotinyl)carboxamidopyridine to produce the 5,11-dihydro-6H-dipyrido[3,2-b:2',3'-e][1,4]diazepine. ,</p> |
