The constituents of the essential oil from the fruit of Pittosporum undulatum / by Frederick B. Power and Frank Tutin.

  • Power, Frederick B. (Frederick Belding), 1853-1927.
Date:
[1906]
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: The constituents of the essential oil from the fruit of Pittosporum undulatum / by Frederick B. Power and Frank Tutin. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    acid and with alkali, as above described, was dried with anhydrous sodium sulphate, and then distilled under 60 mm. pressure. The por- tion which boiled below 110° was collected, and, after submitting this to several fractionations under a pressure of 20 mm., the density of a fraction boiling below 70° was determined, and found to be 0 8466 at 15°/15°, which proved the absence of any olefinic terpene. These liquids were then distilled under the ordinary pressure, and the following fractions collected : below 165°; 165—170°; 170—172°. The density of the fraction 165—170° was found to be 0-8471 at 15°/15°, thus con- firming the absence of myrcene. The fraction 170—172° was specially tested for phellandrene, but with a negative result. Hydrolysis of the Oil. All the oil boiling above 190° under the ordinary pressure was hydrolysed by boiling with an alcoholic solution of 7 grams of potassium hydroxide for about half an hour in a flask provided with a reflux con- denser. After being allowed to cool, water was adde I, and the separ- ated oil collected, washed, and dried with anhydrous sodium sulphate. It was then distilled under 60 mm. pressure, which removed a small amount of non-volatile, resinous matter. Fractional Distillation of the Oil. The hydrolysed oil, together with the portion which had previously been separated under diminished pressure, was then submitted to repeated distillation under the ordinary pressure, when the following fractions were ultimately obtained: below 165°; 165—169° ; 169—173°; 173—180°; 180—185°; 185-195°; 195—205°; 205—215°; 215—225°; 225—235°; 235—245°; 245—255°; 255—270°; 270° + . The last-mentioned fraction was a viscid, green oil, and amounted to only 3'8 grams. Identification of Pinene. Fraction below 165°.—This was a colourless, limpid liquid, which commenced to boil at about 157° and had an odour of pinene. It was nearly insoluble in 70 per cent, alcohol, and amounted to 23 grams. 0-1077 gave 0-3444 C02 and 0T141 H20. C = 87'2; H=118. C10H16 requires C = 88-2 ; H = 118 per cent. cZ15°/15° = 0-8515 ; aD +61°50' in a 1-dcm. tube. This fraction evidently consisted of a hydrocarbon, and was found to contain pinene, as it yielded a small amount of a crystalline nitroso- cliloride, from which the corresponding nitrolbenzylamine, melting at