JOURNAL, 66, 854 (1943). but in only the first of these were we able to demonstrate that fact by synthesis. In the second, and theoretically more important, case involving the formation of a 9, lO-dihydroanthracene derivative, our attempt to confirm the identity of the product by synthesis was unsuc~ essful.~ We felt that by choosing a suitable ketone or, more exactly, ketimine, it would be possible to obtain upon cyclization, a 9, lO-dihydroanthracene ...
