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 3 COCH 2 C-0-C=0 

 II I 



CHCO ' CH 2 

 or the tautomeric form 



CH 3 C (OH) : CHC-O 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, II I . Its forma- 



CH CO-CH 2 



tion from acetic acid is illustrated thus : 



CH.CO 



OH H 



CH 2 CO 



CH 2 CO 



OH H 



CH 2 C O O H 



and then CH, COCH 2 C : CHCOCH 2 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 /*-amido--methyl-thiazole or -/>dimethyl-thiazole as 

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

 formula CH 2 Br COCH 2 CO 2 R . fJ.- Amido-thiazylacetic ester, 



c oi~r ^- 



i ^'CCH 2 C0 2 C 2 H 5 



C(NH 2 ):N^ 



See page 114. 



