Abstract
Various studies on the chemical utilizations of α-pinene which is the principal constituent of pine root oil and most terpentine oils, were carried out by authors and the outlines of the experimental results on the syntheses of terpin hydrate and α-terpineol as medicinal or perfume materials and some polychloro-derivatives as insecticides were reported.
On tse synthesis of terpin hydrate from α-pinene by means of sulfuric acid, the more suitable condition than those proposed by other authors was established and moreover by the addition of some promotors to surf uric acid the yield of terpin hydrate showed an increase of 15 to 20%.
Then, in order to obtain a new effective insecticide from α-pinene, the chlorina-tions of α-pinene and its intermediates, such as bornyl chloride, p-cymene, etc.and the nitration of some intermediates were studied, and it was confirmed that the insecticidal effects of these derivatives of α-pinene were almost simillar or sometimes superior to those of DDT and BHC.Some of the effective constituents of these insecticides were isolated and identified.
