~ 
ens ae group and ‘esterification of he: eee For 
quinoline they methylate 0- hydroxyquinoline by treatment. with d 
sea lye in warm aqueous solution, fee the, ae oe 8-meth 
It j is Sufficient to treat the dry sodium Hiyaroxuduineline at once aah two 1 
of the methylating agent. The methoxyquinoline methylsulphomethylate may be 
¢ B sat 
NH: CH A ee si 
OCHs H;C-O © N-0-SO;CH #5. BG 
(1) 2-Methylamino-3-methoxy- CHs- ee a 
tet mC ae 
benzoic acid. (II) Methoxyquinoline methy]- ; eee 
(Damasceninic acid). sulphomethylate. es ‘ 
“eost oe | (Nco.cti % 
Bare | Boa 
; “OCH: <,, (+ 1. OCH: “25 = eae 
, (III) Formyldamasceninic acid. . (IV) Damascenine. Poe sels 
to formyldamasceninic acid (III) in aqueous solution with potassium permanganate. 
The acid is coloured red by admixture of methoxy methylisatine; at the same time 
some methoxyformylmethylisatinic acid is formed. Formyldamasceninic acid freed fro 
the isatine body melts at 194 to 195°; when heated with dilute hydrochloric acid ite 
split up into formic acid and damasceninic acid (I). On heating the oxidation lye with 
diluted mineral acids methoxy-N-methylisatine is formed, probably through saponific. | 
of the intermediary product, methoxyformylmethylisatinic acid. If, after precipitatic 
and removal of formyldamasceninic acid, the hydrochloric oxidation lye is” heated for 
some time on the water-bath, further quantities of the isatine derivative are separatec 
at first. The filtered solution is then ee ‘sodium acetate, Pee 
on heating formyldamasceninic Sam with a slight excess of nydioorene fe the | 
chloride of damasceninic acid, of the m. p. 206 to 207°, is formed. By heating V 
methyl alcoholic hydrochloric acid damascenine (IV) was obtained from dam: 
* acid hydrochloride as well as from formyldamasceninic acid. 
Oil of. Ocotea usambarensis. In a paper by J. Halbertoarn y on ihe o 
of pseudocubebine in Ocotea usambarensis, Engl.?) we find a paragraph on the : = 
a oil of this lauracea. It had been obtained from an ethereal bark-extract by d ti 
i, 7 
