46 BIBLIOGRAPHY OF 



HANTZSCH, A., 1883. 

 Ber. 16, 1946-1948 ; J. Chem. Soc. 44 1082 ; Jsb. Chem. 1883, 1068. 



Condensation of Acetoacetic Methyl Ester with 

 Aldehyde=am monia. 



This condensation is entirely similar to that with the ethyl ester, a 

 dihydro-collidin-dicarboxylic methyl ester, C 5 N H 2 (CH 3 ) 3 (CO 2 CH 3 ) 2 , 

 being formed. From this were formed dihydro-collidin-monocarboxylic 

 methyl ester, C 5 NH 2 (CH 3 ) 3 H (CO 2 CH 3 ), and collidin-dicarboxylic 

 methyl ester, C 5 N (CH 3 ) 3 (CO 2 CH 3 ) 2 . 



HANTZSCH, A., 1883. 



Ber. 16, 1948-1952 ; J. Chem. Soc. 44 mi ; Jsb. Chem. 1883, 1069 ; 

 Bull. Soc. chim. 42, 182. 



Condensation of Acetoacetic Ester and Ortho=amidophenol. 



These substances condense as follows : 



r* TT / OH I /^v p\ ,^-Cri 3 _ p TT ^^ ^r* .^3 



-r- ~ 



H 5 -f-H 2 0. 



The product, very unstable, being easily decomposed into its com- 

 ponents, melts at io7-io8. A potassium salt, C 24 H 29 KO6N 2 , was 

 formed ; one hydrogen atom of the amid group of every two molecules 

 apparently being replaceable. 



PECHMANN, H. v. AND C. DUISBERG, 1883. 



Ber. 16,2119-2128; J. Chem. Soc. 46, 66; Jsb. Chem. 1883, 1065; 

 Bull. Soc. chim. 42, 587. 



Compounds of Phenols and Acetoacetic Ester. 



In the presence of a dehydrating agent phenols and acetoacetic ester 

 react to form substituted coumarins. 



