| Popis: |
The reaction mixture formed during the heating of pyridine-N-oxide with p-toluenesulphonyl chloride contains, together with pyridine, 2,3′-dipyridyl ether, 3-pyridyl p-toluenesulphonate and N-(2Prime;-pyridyl)-pyridone-2 two chloro compounds, viz. N-(2′-pyridyl)-5-chloro-pyridone-2, which is the chief product, and N-(2′-pyridyl)-3-chloro-pyridone-2. In this connection the formation of brominated derivatives of N-(2′-pyridyl)-pyridone-2 during the reaction of pyridine-N-oxide and 2-bromopyridine, as described by Ramirez and von Ostwalden is discussed. |
