Abstract: A pesticidal composition containing as an active ingredient a polychlorinated naphthalene ester or an acid chloride obtained from a one-step method of preparing nuclearly chlorinated naphthalene esters. The active ingredient is selected from the group consisting of 1,4-dichloro-2,6-dicarbomethoxynaphthalene, 1,4,7,8-tetrachloro-2,6-dicarbomethoxynaphthalene, 1,3,4,7,8-pentachloro-2,6-dicarbomethoxynaphthalene, hexachloro-alpha-methyl naphthate 3,4,5,7-tetrachloro-alpha-methyl naphthoate, 2,4,5,6,8-pentachloro-alpha-methyl naphthoate, 2,3,4,6,7,8-hexachloro-alpha-methyl naphthoate, 1,3,4,7,8-pentachloro-beta-methyl naphthoate and heptachloro-alpha naphthalene carbonyl chloride.

Abstract: A direct, essentially one-step method of preparing nuclearly chlorinated naphthalene esters which comprises forming a reaction mixture consisting essentially of a mono- or dicarboalkoxy substituted naphthalene, a chlorinated organic solvent having from 1 to 4 carbon atoms and a chlorination catalyst, heating the reaction mixture, and passing molecular chlorine into the mixture. The extent of the chlorination of the naphthalene mono- or diester can be controlled by varying the solvent employed, the amount of chlorine added and the reaction time. A number of unreported polychlorinated naphthalene esters and an acid chloride are obtained directly by the method. The esters can be used in the production of coloring materials, plastics and insecticides.

Abstract: A direct, essentially one-step method of preparing nuclearly chlorinated naphthalene esters which comprises forming a reaction mixture consisting essentially of a mono- or dicarboalkoxy substituted naphthalene, a chlorinated organic solvent having from 1 to 4 carbon atoms and a chlorination catalyst, heating the reaction mixture, and passing molecular chlorine into the mixture. The extent of the chlorination of the naphthalene mono- or diester can be controlled by varying the solvent employed, the amount of chlorine added and the reaction time. A number of unreported polychlorinated naphthalene esters and an acid chloride are obtained directly by the method. The esters can be used in the production of coloring materials, plastics and insecticides.