Ryan anp Mitts—On the Synthesis of Galactosides. 07 
The residue was a faint yellow semi-solid syrup, slowly soluble in 
cold alcohol, containing 6:1 per cent. chlorine, showing that it was 
impure acetochlorogalactose (Cale. Cl. 9°68). 
Acetochlorogalactose is insoluble in cold ligroin, dissolves in 
hot ligroin or ether, and is readily soluble in chloroform. The 
yield was forty-eight grams. 
a Naphthylgalactoside, C;H,,0; * O° C,,H;.—18°2 grams of aceto- 
chlorogalactose were dissolved in cold absolute alcohol, and mixed 
with strong cooling with a solution of 7-2 grams a naphthol and 
_ 2°8 grams potassium hydroxide in about 100 c.c. absolute alcohol. 
After remaining in the freezing-mixture for twelve hours, it was 
allowed to stay at the temperature of the laboratory for three days, 
by which time the colour of the solution was brown, and a con- 
siderable quantity of potassium chloride had separated. The 
mixture, which smelt of acetic ester, was boiled for two hours 
under a reflux condenser, and filtered, while hot, from a residue 
which was readily soluble in cold water, and consisted of potassium 
chloride. 
The filtrate, evaporated on the water-bath, gave a syrupy 
residue which, after being left for five days, crystallized. The 
substance was washed free from a naphthol by ether, and recrys- 
tallized from alcohol. 
It was dried in the air at 105°, and melted at 202 — 208°. 
0:1078 gave 0:2571 CO, and 0:0572H.0 - C 62:51, H5°9. 
C,,H,.O0. requires C 62°74, H 5°88 °/, 
a Naphthylgalactoside crystallizes in rectangular plates, soluble 
in hot alcohol and hot water, slightly soluble in cold water, insolu- 
ble in ether, chloroform, benzene, and ethylic acetate. It has 
scarcely any action on Fehling’s solution, but reduces it readily 
after hydrolysis by dilute sulphuric acid. Unlike carvacrylgluco- 
side and $naphthylgalactoside it is not more soluble in dilute 
potash than in water. It does not, therefore, contain an unchanged 
phenolic hydroxyl group, and has a similar constitution to that of 
8B naphthylglucoside. 
