A survey of the substances isolated from Derris root is given. The isolation and the properties of a substance, first discovered by Buckley, are described. A new optically active substance, termed derride, isomeric with Buckley's compound is recorded. Its formula is given and a few of its properties are described. Some derivatives of this substance have been prepared. A tabular comparison of Buckley's compound and derride is given. A new, optically active substance has been isolated from a sample of derris root of the Sumatra type. Its formula is suggested and a few of its properties are given. Sumatrol and l‐toxicarol have been isolated.
It is shown that derride can be converted into Buckley's compound by treatment with alkali. A substance termed derridic acid analogous to derrisic acid was obtained from derride by the action of alcoholic potash. Oxidation of derridic acid with hydrogen peroxide afforded derric acid while oxidation with potassium permanganate gave a small yield of a substance, which might be rissic acid. On oxidation of derride with chromic acid two compounds were formed, one derridenone, the analogue of rotenonone of which the hydrazone was prepared, and the other an acid with the probable formula C9H6O4. Hydrogenation of derride in acetic acid with platinum oxide as a catalyst lead to the isolation of a very highly hydrogenated product. It was shown that in the preparation of dehydroderride, treatment with zinc to eliminate iodine can be omitted.
A research has been carried out with regard to the composition of the essential oils distilled from the leaves of Litsea cubeba Pers. Two types of oil were found to be present, namely, Litsea oil with a relatively high content of the aldehydes citronellal and citral and Krangean oil with a small content of aldehydes, but with a high content of cineol. The constituents of both oils were isolated and identified and the quantitative composition was determined.
By applying the diene-synthese to samples of fresh oil from Aleurites montana, the relation diene-number = 1400 (ni5 -1.4681)was found. Also the relations bromometric iodine number = 925 (nt5 -1.3414), Wijs-lodinenumber = 1300 ( n i 5 -1.3W)e nf-n, = 0.25 (nt5 -1.4367) f 0.0003 and time of gelatination (282") = 71.4 -6/7. Diene-number + 0.3 Acid-number were determined. These formulas cannot be applied to old samples of t u g oil on account of the polymerisation.The polymerisation of tung oil decreases the diene-number, iodine-number and dispersion linear with the refraction.This makes it possible to determine the constants of an old oil In its original fresh condition.By applying the diene synthesis of D i e 1 s and A 1 d e r 1) to wood oil 2 ) it is possible to determine the compounds present with conjugated double bonds, quantitatively, good results being obtained by following the recommendations of E 1 1 i s and J o n e s, particularly the accelerated method by heating for one hour with a little iodine as catalyst.In the investigation of a large number of oils, pressed from seeds of Aleurites monfana, derived from different parts of Java, it was found that a linear relation exists between the diene number and the refractive index, provided one is dealing with fresh oils.Hence it is possible to calculate the diene number of the oil by means of the formula: diene number = 1400 ( n -1.4681 ).With 75 samples of oil a difference of about 0.2 was observed on the average between the experimental and calculated diene number, while the maximum deviation amounted to 0.6 in one case. Usually the (Java).
Das 0 1 \'on Aleurites trisperma besteht hauptsachlich aus den Glyceriden der Eldostearinsaure, Linolsiurc. Olsdure, Palinitinsaure und Stearinsaure. Im Geyensatz zu der Anyabe von J a m i e s o n und M c K i n n e y
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