It was desired to obtain for potentiometric study quinones or hydroquinones derived from quinoline and isoquinoline. In the case of the former heterocycle no preparative problem was involved, for 5, 8-quinolinequinone is a known compound'and Matsumura and Sone2 have developed a very convenient method for the preparation of the corresponding hydroquinone. In the isoquinoline series, however, compounds of the desired type do not ...
