The present study concerns itself with various new approaches to the problem of attaching substituents at the 1,6 positions of naphthalene, since several compounds of this type were desired for antimalarial investigations. One such approach was the Gattermann reaction with 2-chloronaphthalene, hydrogen cyanide, and aluminum chloride. An aldehyde was obtained, m.p. 100-102°, which changed to 7-chloro-l-naphthoic acid on oxidation. It was, therefore, the previously undescribed 7-chloro-1 -naphthaldehyde. The fact that the crude aldehyde melted at 82-85°s uggests that 6-chloro-l-naphthaldehyde (m.p. 83-84°) was also present.Several new compounds were made from Cleve's acid, 5-amino-2-naphthalenesulfonic acid. These included sodium 5-cyano-2-naphthalenesulfonate made