Notes on scientific research. 153 



regenerated. Carvylidene hydrazine was not obtained in the pure state, as decom- 

 position set in during the distilling-process. 



Phenol bases. In continuing his syntheses in the fatty-aromatic series 1 ) 

 J. von Braun, in collaboration with H. Deutsch 2 ), has prepared a few phenol bases, 

 namely o- and j?-hydroxyphenylpropyl dimethylamine, ^-hydroxyphenylbutyl methylamine, 

 and j9-hydroxyphenylamyl dimethylamine, with many derivatives, among which we may 

 briefly refer to homotyrosol (p-hydroxyphenylpropylalcohol). This body, which melts 

 at 55°, is physiologically neutral, in contradistinction to tyrosol. Its dibenzoyl derivative 

 has m. p. 72°. 



l ) Comp. Report October 1912, 164. — 2 ) Berl. Berichte 45 (1912), 2504. 



