— 149 — 



on the steam-bath. The bromo-ester obtained by pouring the bromo-acid 

 chloride into alcohol, was digested by the authors with potassium acetate 

 in acetic acid solution. The reaction-product was hydrolysed with alcoholic 

 potash liquor, «-hydroxycamphane carboxylic acid (VI) being formed in the 

 process. This acid, when oxidised with peroxide of lead, permanganate, 

 or chromic acid, gave a small yield of e/M camphor (II). 



I^icamphor volatilises readily with steam and possesses the same 

 odour as camphor. The m. p. was found to be 165°, but the authors intend 

 to repeat this determination as soon as they have a larger quantity of the 

 substance at their disposal. The oxime of e^camphor melts at 102°, and 

 the semicarbazone between 225 and 227°. 



J. Bredt and W. Hilbing 1 ) are of opinion that ^'camphor is identical 

 with the ^-camphor prepared by them. These authors took as their starting- 

 material bornylenecarboxylic acid, the chloride of which (b. p. 114 to 115° 

 at 14 mm.) they converted into the semicarbazide 2 ) by treating it with 

 hydrazine hydrate, the semicarbazide being subsequently converted by 

 Curtius' method into the azide. By Curtius' conversion method they ob- 

 tained from the azide, aminobornylene (VII) or /3-camphorimine (VIII) which 

 was converted by boiling with acid into the corresponding camphor, viz., 

 ^-camphor (II) (bornylone). The constants of /^-camphor are as follow: 

 m. p. 181 to 182° (184 to 185° after purification from primarily produced 

 semicarbazone), b. p. 213,1 to 213,4°. /?-Camphoroxime has m. p. 237 to 

 238°. With nitric acid ^-camphor is oxidised into /^-camphoric acid. 



^-Camphor is rather more volatile than ordinary camphor. 

 CH CH 









/\\ 











/ 









H 2 C 



CH 2 





H 2 C 



/ 





CO 





H 2 C 



C(Chh)> 



CO 





H 2 C 



c 



(CH:))» 



CH 2 







CCH 3 



J 







( 



1 



;ch. 



i 



{ 





CH 





CH 





ll 



CH 



H a c/ 



\ 



o- 



IC0 2 H H 2 Cf 



C-C0 2 I 



-1 H. 2 c/ 



^CH-C0 2 



H 2 C X 



C(CHa)2 



cc 



) H 2 cl 



c 



{CH* 



CH 



H 2 cL 



C(CH,)-2J 



;ch 2 





C-CH 



in 



} 







( 



:ch 



3 







CCH 3 



V 



*) Chem. Ztg. 35 (1911), 765. 



2 ) This should probably be acid hydrazide. 



