36 BIBLIOGRAPHY OF 



HALLER, A. AND A. HELD, 1882. 



Compt. reud. 95. 235 237; J. Chem. Soc. 42, 1280; Jsb. Chem. 1882, 845. 



Cyanacetoacetic Ester and its Derivatives. 



Cyanacetoacetic ester, CH. CO CH (CN) CO2C2H5, was produced 

 by passing cyanogen chlorid into sodacetoacetic ester. It is a solid, 

 melts at 26° and remains in a superfused condition even at — 15° ; the 

 liquid has a specific gravity of 1.102 at 19° Potassium hydroxid de- 

 composes it. The sodium and calcium derivatives were described. 



SCHMID, WILHELM, 1882. 



J. prakt. Chem. I33, 81-83. 



New Method of Producing Resocyanin, 



Acetoacetic ester and resorcin react in the presence of zinc chlorid to 

 form resocyanin, which is : C6H3(OH}2C(CH3) : CHCO2H [C : OH : 

 0H= 1:2:4]. 



WITTENBERG, MAX, 1882. 



J. prakt. Chem. I34, 66-78 ; J. Chem. Soc. 42, 1289; Ber. 15, 2908 ; 

 Jsb. Chem. 1882, 716 ; Bull. Soc. chini. 39, 72- 



Resocyanin and the Action of Acetoacetic Ester on Phenols in 

 Presence of Dehydrating Agents. 



Pyrogallol, C6H3(OH)3, and acetoacetic ester react in the presence of 

 sulfuric acid to form allylene-digallein, C15H12O6, which melts at 235° 



roH 



and has the constitution : C6H3 -) O— CH2 



(o- V 



C6H3 ] O- CH2 



(OH Iforcinol, C6H3(CH3)(OH)2, 



