1910 



710 



1910 



7-Methyl-7-ethylaconic acid 



Me . CHj . CMe -CCCOsH) 



I 



— CO — CH 



and its salts. 



Stobbe, Haus. Liebigs Ann. Chem., 

 Leipzig, 321, 1902, (83-126). 



CYCLOIDS C8H8O4 



3-Bromo-4.fi-dimethyl-l.2-pyrone 

 5-carboxylic acid 



Methyl ester C9Hg04Br 



Buchner, Eduard und Schroder, Hein- 

 rich. Berlin, Eer. chem. Ges., 35, 1902, 

 (782-790). 



Aesculetin dihydride 

 (OH),aH,<^ ■ ?^ 



Liebermann, C[arl] und Llndenbaum, 

 S. Berlin, Ber. D. chem. Ges., 35, 1902, 

 (2919-2923). 



CYCLOIDS C8H12O4 



Tetramethylglycolide 



Q CMe, . CO Q 

 ^^CO . CMej-^^ 



Emhom, Alfred und Mettler, Carl. 

 Berlin, Ber. D. chem. Ges., 35, 1902, 

 (3639-3043). 



Trimethylparaconic acid 



CMe, . CO 

 CO2H . CMe . CH,-^ 



Noyes, William A[lbert] and Patter- 

 son, Austin ]\1. Terre Haute, Ind. Cent. 

 Chem. Lab. Rose Polyt. Inst., No. 31 ; 

 Amer. Chem. J., Baltimore, Md., 28, 

 1902, (228-232). 



CYCLOIDS C H6O4 



1 3.-Dioxychromone 



(Dioxyhenzopyrone) 



and l.3.-Dimethoxychromone. 



Kostanecki, 8t. von nnd Ruijter de 

 WUdt, J. C. de. Berlin, Ber. D. chem. 

 lies., 35, 1902, (8G1-8G5). 



3-Methoxy-l-hydroxychromone. 



Kostanecki, St[anislaus] von und 

 Ruijter de Wildt, J. C. de. Berlin, Ber. 

 D. chem. Ges., 35, 1902, (801-865). 



1 : O-Dioxycoumarin 

 Dimethyl ether 



C5H2(OMe)2 



,CH : CH 



— CO 



MONOCHLORO DERIVATIVE 



C11H9O4CI i.e. CoHCl(OMe)2<' 



CH:CH 

 0— CO 



DlCHLORO DERIVATIVE 



CnHgO^Clj i.e. C6HCl(OMe)2<' 



CH : CCl 

 "0— CO 



AND THE CORRESrONDING DIBROMO DERIVA- 

 TIVE. 



Tilden, W. A. and Burrows, H. [4 : 6- 



Dimethoxycoumaiin (limettin) and the 

 action of methyl iodide on its silver 

 salt. Mono- and dichlorolimettin and 

 the action of alkali on the latter. Di- 

 bromolimettin, the action of potash and 

 of sodium ethoxide on it, and its bronii- 

 nation.] London, J. Chem. Soc., 81, 

 1902, (508-512). 



Tribrlijio-dioxycoumabin 



Diacetyl derivative 



C,3H,OeBr3 i.e. CeBr3(OAc)3<^^- 9^-" 



Tilden, W. A. and Burrows, H. 



[1 : O-Diacetoxytribromocouniarin ob- 

 tained by the action of acetic anhydride 

 on the product of the bromination of 

 limettin]. London, J. Chem. Soc, 81, 

 1902, (508-512). 



CYCLOID C10H6O4 



Chromone /3.carboxylic acid 



(Benzopyrone carhoxylic acid) 



C6H,< 



O . C . C02H 

 CO . CH 



Heywang, R. und Kostanecki, 



St[anislaus] von. Berlin, Ber. D. chem. 

 Ges., 35, 1902, 2887-2891). 



