ection of Organic anol Esters. The weak solubility in acids of the material 
“to be esterified, which. renders the preparation of organic borneol te camphol”) esters 
n camphene or pinene hydrochloride so difficult, has, according to A. Dubosc), been | 
or ‘removed, by adding sulpho compounds, Sulphoricinic acid in preference to all others. © 
| ‘The sulphonic acid itself does not enter into the reaction; after separation of the 
e oa the borneol ester obtained is converted into borneol by saponification. 
From the black-lye of the sulphate- cellulose manufacture O. Aschan and K.E. Ekholm ?) | 
“were able to isolate a new body, pinabietic acid CooHg9O2. This resin acid (m. p. 176 to 
178°) crystallises in glittering needles, and when dissolved in chloroform and acetic 
_anhydride, gives a purple-red coloration with a little concentrated sulphuric acid, changing 
into violet, blue, and finally black. The optical rotatory power depends on the solvent, | 
with which the acid probably forms additive compounds. 
Re action of benzyl alcohol, benzaldehyde and 1 benzyl ester on helminthes, see p. 660 
es this Report. 
' Glucosides. 
G. De defen) seeaared several new acylated peiloniosides, nepticert: -benzylcello- ! 
- bioside, heptacetyl-methylcellobioside, heptacetyl-isobutylcellobioside and heptacetyl- 
i __ phenylcellobioside, in order to isolate from them, by treatment with hydrobromic acid 
3 in glacial acetic acid solution, the crystalline acetylbromocellobiose(m. p.190°, e520 4-929). 
In these experiments he proved that the glucoside bond is broken, but that the = 
_ disaccharide, however, is not hydrolysed. The cleavage ensued as follows: — — 
_ CsH;CH)- O- Ci2H14010(CO- CHs) =e 2HBr TA CoHsCH2Br + Me O a Ci2H14010(CO- CHs);Br. 
Heptacetyl- -benzylcellobioside _ Acetobromocellobiose ~ 
; The same treatment in the case of ‘amygdalin led to no result. It follows from 
es ‘this, that by the presence of the nitrile group, the glucoside linking between ‘the 
nitrile of mandelic acid and the biose becomes 
a 
__ stronger than the ether. bond between the £WO. 7/2 GatluO10(CO CAs): 
- glucose radicles. — Cols: CHC | | 
; Further experiments led to the mieinioe ee ~ 
ofa tetradeca-acetyl- -di-amygdalinic acid imide (I) CO: ; 
_ (m. p. 212°; O&p210 — 72.19), which was obtained C.Hs° ‘CHE 
by the action of hydrochloric acid gas on O- Ci2Fii4O10(CO - CH); 
_heptacetyl-amygdalin. 7 (I) Tetradéca-acetyl-di-amygdalinic acid imide. 
P. Karrer and H. Weidmann*) obtained the methyl ester of 8-d-glucoside-o-salicylic 
_acid by methylating the salicinic acid (I) earlier prepared by them with diazomethane. 
The ester showed other properties than the isomeric natural product gaultherin (II)*), 
f. ‘especially in its behaviour with enzymes. Whilst gaultherin is split up by the enzyme 
gaultherase, but not by emulsin, the methyl ester of ‘salicinic acid is decomposed by 
we. 1) Caoutchouc et Guttapercha 15 (1920), 9555. As per Chem. Zentralbl. 1920, 1.115. — %) Finska Kemistsamfundets 
; 7 Meddelanden. As per Chem. Zentralbl. 1919, 1. 285. — #*) Berl. Berichte 58 (1920), 990. — +) Helvet. Chim. Acta 3 
_ (1920), 252. — 5) The glucoside gaultherin, from which methylsalicylate is obtained by fermentative splitting 
Ee is present in the plant Gaultheria procumbens, L., in birch bark, in the roots of Polygala and Spircea species, 
in the cultivated pansy. 
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