Method B.--After refluxing the freshly prepared potassium salt (VII) with 5% hydrochloric acid (175 ml.), the benzothiazole (IV) crystallized on cooling. Recrystallization from alcohol gave 3.7 g.(30% yield from 15 g. 2f VI), mp 13-154.5"(cor.), reported value mp 151,, 30% yield.: This corresponds to an 18% yield from the pitroanisidine as compared with 14.770 previously obtained.* This compound was identical with that obtained in method A but was ...
![benzo[f]quinolin-5-ol Structure](https://image.chemsrc.com/caspic/391/65690-56-4.png)