104 BIBLIOGRAPHY OF 



DELISLE, A., 1889. 



Ber. 23, 306-309 ; J. Chem. See. 5^f 488. 



Ketosulfids and Ketosulfid Acids. 



The compound described in Ber. 20, 2008, obtained from acetoacetic 

 ester and sulfur dichlorid is found to be CizHisOgS intead of CioHi406S 

 and the formula 



CH3C:CHC03C2H5 

 I 

 O 



s 



/ 



o 



CH3C:CHC0, C2H5 



is ascribed to it. 



HELD, A., 1889. 



Ann. chini. phys. [6] 18, 468-531 ; Ber. 23, 287(C). 



Derivatives of Cyanacetoacetic Esters. 



The first part of this article is the same as that in Bull. Soc. chini, 

 [3]*) 306 '"S By treating cyanacetoacetic ester with ammonia, amido- 

 cyanacetoacetic ester, CH3 C (NH2):C (CN) CO2 R, is obtained which 

 melts at 188.° It is neutral wherefore the above formula is given to it. 

 When it is treated with an alkali, sodcyanacetoacetic ester is obtained. 

 If sulfuric acid be added to the mother liquor left after the formation of 

 the above, a monobasic acid Cy He N2 O2 is obtained. The sodium, 

 barium, ammonium, silver, copper and lead salts and ethyl ester were 

 described. When heated with hydrochloric acid, carbon dioxid is given 

 off and another acid Ce Hy NO2 is formed. The author is at work on 

 the constitution of these acids. Ethylamin acts on cyanacetoacetic 

 ester to produce the compound CH3 C (NHC2 H5):C(CN) CO2 R and 

 the acid Cg Hjo Nj O3. Cyanacetoacetic ester boiled with water gives 

 Cg Hs N2 O which sublimes at 200° and is a condensation product of 

 cyanacetone, 



CHC0CH2(CN) 



CHsCCH^CCN). 

 *See page 105. 



