99 
Tetra-Benzoyldatiscetin. 
Baumanns method of introducing benzoylgroups into hydroxy- 
lated substances applied to datiscetin did not give satisfactory re- 
sults. The reaction between datiscetin and benzoylehloride takes 
however place very readily in the presence of pyridine. 
5 g of datiscetin were dissolved in 50 g of pyridine and to 
this solution 12:3 g of benzoylehloride were added in small quan- 
tities; a rise of the temperature was stopped by cooling the vesel 
with water. The originally brown solution turned gradually reddish 
brown and pyridine hydrochloride was formed in large quantities. 
After 24 hours standing at ordinary temperature, the mixture was 
poured into diluted sulphurie acid and after the lapse of two days 
the sediment produced filtered off, washed with water and dryed 
in a desicator. The benzoylation product was finally erystallized 
several times from boiling diluted aceton. It represents white needles, 
melting at 190—191°, difficultly solubly in acetic acid, alcohol and 
ether. The results of three analysis point to tetrabenzoyldatiscetin: 
1) 01886 g gave 0.5078 & CO, and 0.0665 & H,O 
2) 0-1799 04881007 SU 70.065300, 
3) 0:1880 0055 EMEA 0:0647 
/ ” N 
8 
7 n ” 
1 n 
corresponding to: 
1) 73:430/, C and 394°), H 
23 220, una Sen, 
SNS RU ANA EN EC EU A 
middle 13:332/9 0 31909 06 
The formula C,,H,O, (COC,H,), requires: 
C : 73480}, 
BR re 
It seems therefore quite certain that datiscetin contains four hy- 
droxylgroups. It is isomerie with luteolin and fisetin and is pro- 
bably à flavon or flavonol derivative. The investigation of its consti- 
tution must be based on the study of its decomposition products 
under the influence of alkalies at elevated temperatures. Up to now 
the results obtained are however unsatisfactory; we isolated only 
phenol and salieylie acid and it is therefore for the present im- 
possible to get a clear view of the constitution of datiscetin. 
9% 
a 
