ACETO ACETIC ESTER 65 



160.5° When saponified, this yields triphenyl-carbinyl ethel ether, 

 C2 HjOCCCe 1^5)3, melting at 83°, which, treated with acetyl chlorid, 

 gives CH3 CO2 C(C6 115)3. Triphenyl-carbinyl-acetoacetic ester when 

 distilled yields triphenyl methane, CH (Ce 1^5)3, which melts at 92° and 

 boils at 358° to 360.° 



QEUTHER, A,, 1885. 



Ann. Chem. 227, 383-384. 



Upon the History of Acetyl=acetoacetic Esters. 



After noticing the claims made by James and bj^ Elion to the first 

 production of these esters, the author calls attention to the fact that 

 Lippmann produced mono- and di- acetyl-acetoacetic esters in 1869 

 (Ztschr. Chem. 1869, 28). 



HAITINGER, L., 1885. 



Ber. 18, 452-453 ; J. Chem. Soc. 48, 761. 



Dehydracetic Acid. 



Dehydracetic acid when treated with aqueous ammonia gives 

 Cs Hg NO3 and C7 H^ NO. The former is an acid which, when heated, 

 gives the latter, which is a weak base. When Cy Hg NO is distilled 

 with zinc dust lutidin, C7 Hg N , boiling at 147° to 151° is obtained. 

 Some analogous reactions of dehydracetic acid and chelidonic acid are 



given. Chelidonic is ; C (CO^ H) < qj^_^ qq^' ^^ > CH and dehy- 

 dracetic acid is ; C (CH3) < ch"— CcT''' > ^^^' ^ • 



