The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
An efficient Pd/C aromatization of 1,2,3,4,9,10-hexahydroacridine-1,9-diones to 1-hydroxyacridones is reported. The previously reported four-step synthesis of the diones has been extended to give a number of methoxy substituted derivatives and the aromatization reaction, along with hydrobromic acid demethylation, provides a useful route to various methoxy and hydroxy substituted acridones.
The previously reported dihydroazafluoranthene (8) has been converted, over a number of steps, into the σ-homo-o-benzoquinone monoacetal (5). The structure of compound (5) was established by X-ray crystallographic methods and treatment of this material with trifluoroacetic acid resulted in formation of the tropoloisoquinoline alkaloid imerubrine (1). Alternatively, acetal (5) could be hydrolysed...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.