96 BIBLIOGRAPHY OF 



QEUTHER, A., 1888. 

 Ann. Chem. 244, 190-221 ; J. Chem. Soc. 54* 579; Ber. 21, 295 (C). 



Constitution of Acetoacetic, Succinosuccinic and 

 Quinone-hydro-dicarboxylic Acids. 



The author contends for the constitution of acetoacetic ester as 

 CH 3 COH : CHCO 2 C 2 H 5 , giving as a proof of the hydroxyl group the 

 similarity of reactions between acetoacetic ester and phenol and salicylic- 

 ester, (i) towards potassium hydroxid and then carbon dioxid when, 

 he states, the original substances are regained, (2) towards potassium 

 cyanid, when potassium compounds are produced, although the potas- 

 sium compounds of salicylic and succinosuccinic esters are decomposed 

 into alcohol and the potassium salts and the acetoacetic ester compound 

 is decomposed into alcohol and the potassium salt, which latter is then 

 further decomposed into potassium carbonate and acetone, (3) towards 

 ferric chlorid, as to the colors produced. He cites the easy decompo- 

 sition of acetyl-acetoacetic ester as a proof that it has the formula 

 CH 3 CO (COCH 3 ) : CHCO 2 C 2 H 5 . In the formation of sod-acetoacetic 

 ester he supposes the intermediate bivalent group CH 3 CONa : is formed 

 which unites with acetic ester liberating two atoms of hydrogen. 



MEISTER, JOHANNES, 1888. 



Ann. Chem. 244, 233-253 ; J. Chem. Soc. 54 675 ; Ber. 21, 427 (C). 

 Condensation Product of Urethane and Acetoacetic Ester. 



Acetoacetic ester and urethane condense thus : CH 3 COCH 2 CO 2 R+ 



. The product is the 



same as that produced from chlor-carbonic ester and paramido-aceto- 

 acetic ester and so is given the above formula. Alcoholic potash saponi- 

 fies it giving an oil C I2 H 23 NOe , considered as 



CH 3 C (OH) CH 2 C0 2 C 2 H 5 . 



>NH 

 CH 3 C (OH) CH 2 C0 2 C 2 H 5 . 



A tribrom-derivative of the condensation product was formed but a 

 trichlor-derivative could not be formed. 



