128 



BIBLIOGRAPHY OF 



COLLIE, J. NORMAN, 1891. 



J. Chem. Soc. 59. 179-189. 

 Constitution of Dehydracetic Acid. 



The author, having studied this acid and its reactions, determines 

 that Feist* did not present the correct formula for it and proposes the 

 formula 



CH, COCH2 C-0-C=0 



CHCO • CH, 



or the tautomeric form 



CHjCCOH) :CHC-0- 



-c=o 



CHC (OH) : CH 

 By this formula he thinks that all of its reactions, the most important 

 ones of which he illustrates, can best be explained. He considers it as 



CH-O-CO 



built up on the nucleus of a-oxypyrone, ! i • Its forma- 



CH— CO— CH, 



tion from acetic acid is illustrated thus 

 CH3CO 



I 



OH H CH.CO 



OH H 



CH.CO 



OH H 



CH2COOH 



and then CH3 COCH^ C : CHCOCH^ CO 



O 



H 



OH 



STEUDE, M., 1891. 

 Ann, Chem. 261, 22-47 ; J. Chem. Soc. 60, 742 

 Thiazole Derivatives from Bromacetoacetic Ester. 



The thiazole derivatives obtained from bromacetoacetic ester and 

 thio-carbamid and thiacetamid are isomeric with those obtained if 

 chloracetoacetic ester be used, but those obtained both ways can be 

 converted into a-amido-a-methyl-thiazole or a-//-dimethyl-thiazole as 

 the case may be. This proves that bromacetoacetic ester has the 

 formula CH2 Br COCH2 CO2 R- /><-Amido-thiazylacetic ester, 

 S CH^ 



C(NH2):N' 



,C CHo CO2 C2 He 



*See page 114. 



