I08 BIBLIOGRAPHY OF 



methronic ester, Cg 117(02115)05, a crystalline substance which melts 

 at 75°-76f The calcium, barium and silver salts were described. From 

 it was prepared methronic acid, 



CH3 C - CHCO2 H 



II I 



CO2 HC CH, 



\ / 

 C 



o 



which decomposes at high temperatures to form uvic acid. Methronic 

 diethyl ester, Cg He (C2H5)2 05, and a phenylhydrazin derivative were 

 also described. By heating acetoacetic ester and pyruvic acid, 

 CH3 COCO2 H, with acetic anhydrid, hydrogen methyl methronic ester 

 is formed and from this the methyl-methronic acid which is 



No acid salts of this are known but the normal calcium, barium and 

 silver salts were described. Methyl-methronic diethyl ester was also 

 described. From methyl-methronic acid were obtained methyl-uvic acid, 



CH3 C - CHCO2 H CH3 C - C p2' ^ 



II I II I ^ ' 



HC CHCH3 or HC CH2 



\ / \ / 



C c 



o o 



and dimethyl-keto-pentene, 



CH3 C — CH2 CH3 C — CHCH3 , 



II I or II I 



HC CHCH3 HC CH2 



\ / \ / 



C C 



O O 



I 



