150 — 



phenol group. Hence it shows, particularly also in its other physical 

 properties, a great similarity to phloracetophenone dimethyl ether, a body 

 first prepared from phloroglucinol trimethyl ether by Friedlander and 

 Schnell 1 ) and afterwards studied more thoroughly by von Kostanecki 

 and Tambor 2 ). As is apparent from its mode ot preparation, this 

 body possesses the following constitution: — 



CH 



H Q CO.C 



HC 



COH 



C-CO-CH, 



C.OCH3 



Closer comparison of the phenol which occurs in Ngai camphor 

 oil and its derivatives with the corresponding derivatives of Kosta- 

 necki's phloracetophenone dimethyl ether shows that the identity of 

 these two phenols no longer admits of doubt, for the melting points 

 of the phenol, its acetyl product, etc., completely agree with those of 

 the corresponding derivatives of the synthetic phenol. Finally, the 

 question of the identity of both bodies was clinched by the preparation 

 of the 2-hydroxy-4, 6-dimethoxychalkone, the product of condensation of 

 phloracetophenone dimethyl ether with benzaldehyde. This combination, 

 prepared according to Kostanecki 's directions from the natural 

 phenol, presented itself in yellow crystals, m. p. 91 to 9 2°, and possessed 

 the same properties as that prepared synthetically. Combustion gave 

 the following figures: — 



Found : 



Calculated for C 17 H 16 G 4 



c 71,94% 71,83% 



H 5,78% 5,63% 



is body has the following formula: — 



H 3 CO.C 



CH 



^V-OH 



! 



H-C 



sx Jc.CO-CH = CHC G H 5 



COCK 





The acetyl product prepared therefrom also possessed a melting 

 point of 130 , which is that already indicated by Kostanecki. 



The trimethyl ether obtained from the phloracetophenone dimethyl 

 ether could be oxidised with 3,3 per cent, permanganate solution at 



*) Berl. Berichte 30 (1897), 2152. 

 2 ) Ibidem 32 (1899), 2262. 



