proved procedure which affords 5 in 55% yield from benz [a]-anthracene (6). The starting 6 was prepared by condensation of phthalaldehydic acid with naphthalene to yield 3-(1- naphthy1) phthalidell which was reduced to 2-(l-naphthylmethy1) benzoic acid12 followed by ring closure, reduction of benzanthrone, and dehydration to yield 6 in 76% overall yield. Compound 1 is being tested for carcinogenic activity.
