journal article
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doi: 10.1007/BF03171000pmid: N/A
The synthesis of tambuletin has been effected. Kaempferol is first benzylated to the tribenzyl-ether which is subjected to oxidation with alkaline persulphate, partial methylation and debenzylation in succession.
doi: 10.1007/BF03171003pmid: N/A
1. The refractive dispersion of dextro, lævo and racemic forms of borneol, camphor, camphoric acid, camphoric anhydride and camphor carboxylic acid has been determined in alcohol at 35°C. for five wavelengths. The values of the refractive indices are identical for the three forms and fit in a Sellmeier equation. 2. The equality of the refractive indices of the dextro and lævo forms supports Pasteur’s Law of Molecular Dissymmetry. 3. The values of λ0, the wavelength of the characteristic absorption band, calculated from the Sellmeier refractive dispersion equations are in remarkable agreement with those deduced from the Drude rotatory dispersion equations. 4. A rotatory dispersion equation for camphoric anhydride, which cannot be determined from its rotatory power data, has been deduced by employing λ0 calculated from the Sellmeier refractive dispersion equation.
doi: 10.1007/BF03171004pmid: N/A
(1) The solubility-composition isotherm of mixtures of active and inactive camphor carboxylic acid in water at 30°C. has been determined. (2) The isotherm consists of three curves with two isothermal invariant points indicating the inactive acid to be adl-compound. (3) The melting point-composition curves of mixtures of active and inactive camphorcarboxylic acids have also been determined. (4) The curve shows two well pronounced minima (eutecti) showing that the inactive acid is adl-compound, in conformity with the solubility results.
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