110 BIBLIOGRAPHY OF 



at 719 m. m. pressure. An aqueous solution of this gives with barium 

 hydroxid C 7 H 8 O 3 Ba a (xantho) barium salt, 



O-Ba-O 



I I 

 CH 3 C CCH 3 , 



II II 

 CH CH 



\ / 

 CO 



which, when treated with hydrochloric acid gives a tri-ketone 

 CH 3 COCH 2 COCH 2 COCH 3 , which melts at 49 and at higher 

 temperatures gives off water and forms dimethyl-pyrone again. 

 When the triketone is heated with ammonia, lutidone is formed. 



KRAFFT, F. AND J. MAI, 1889. 

 Ber. 22, 1757-1759 ; J. Chem. Soc. 56, 1017. 

 Myristic Aldehyde. 



When myristic aldehyde, C I3 H 27 CHO, ammonia and acetoacetic ester 

 are mixed a reaction takes place and hydrotridecyl-lutidin-dicarboxylic 

 ester, 



Ci 3 H 27 



C 



/ ^ 

 CO 2 C 2 H 5 CH CCO 2 C 2 H 5 , 



CH 3 CH C CH 3 



\ ^ 



N 



is formed, which melts at 6o. From this were formed the corres- 

 ponding compounds ; tridecyl-lutidin-di-carboxylic ester, tridecyl- 

 lutidin-di-carboxylic acid and tridecyl-lutidin. 



