ACETO ACETIC ESTER - 11} 



MICHAELIS, A. AND OSCAR BURCHARD, 1889. 



Ann. Chem. 254, 1 15-128. 

 Syntheses by Means of Sodium=phenyIhydrazin. Ethylenphenyl= 



hydrazin. 



In the last paragraph of this article mention is made that ethylen- 

 phenylhydrazin easily condenses with acetoacetic ester to form a 

 beautiful crystalline substance which melts at 54.° It is being 

 investigated by the authors. 



RAYMAN, B. AND O. POHL, 1889. 



Ber. 22, 3247-3249 ; J. Chem. Soc. 58, 355. 



Rhamnodiazin. 



Rhamnodiazin, C18 H32 Os N2 , is further studied but no very definite 



results are obtained. Its constitution is probably CH3 (CH0H)4 CH 



CTT 

 (N:C < o-rj^ r^r\ o TT \ When rhamnose, acetoacetic ester and an 



amin are mixed they form rhamnosamin. 



KIPPING, F. STANLEY AND W. H. PERKIN, Jr., 1890. 



J. Chem. Soc. 57» 29-38 ; Ber. 23, 249 (C). 



a=w=DiacetyI=a=(«;=diethylpentane. 



This substance whose properties and reactions are described is 

 obtained by treating sodacetoacetic ester with tri-methylene bromid. 

 These substances combine to form a-w-diacetyl-a-<«j-diethyl-pimelic 

 ester which is 



CH3 CH3 



CO CO 



C(C3H5)-(CH2)3-C(C2H5) 



CO2 C2 H5 CO2 C2 H5 



and when this is boiled with alcoholic potash there is formed a- (t»-diacetyl- 

 a-«j-diethyl-pentane, CH3 COCH (C^ H5) (CH2)3 CH (C2 H5) COCH3, 

 as well as some w-acetyl-a-^«^-diethyl-caproic acid. 



