ACETO ACETIC ESTER 65 



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

 C 2 H 5 OC(C 6 H 5 ) 3 , melting at 83, which, treated with acetyl chlorid, 

 gives CH 3 CO 2 C(C6H 5 ) 3 . Triphenyl-carbinyl-acetoacetic ester when 

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

 boils at 358 to 360. 



GEUTHER, A,, 1885. 



Ann. Chem. 227, 383-384. 



Upon the History of Acetyl-acetoacetic Esters. 



After noticing the claims made by James and by Hlion 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 H 9 NO 3 and C 7 H 9 NO. The former is an acid which, when heated, 

 gives the latter, which is a weak base. When C 7 H 9 NO is distilled 

 with zinc dust lutidin, C 7 H 9 N , boiling at 147 to 151 is obtained. 

 Some analogous reactions of dehydracetic acid and chelidonic acid are 



given. Chelidonic is ; C (CO 2 H) < ~_^ ^ 2 H) > CH and dehy- 



dracetic acid is ; C (CH 3 ) < > CC 2>H 



