1910 



886 Cycloids containing oxygen. 



3, 4, 2'-Trioxyflavonol 



also TfilMETIIOXYFIAVONOI, iUnl its 



acetyl derivative. 



Cohen, S. S. unci Kostanecki, St. \oii. 

 Berlin, Ber. D. chem. Ges., 37, 1904, 



(2627-2631). 



3, 4, 3'-TnOxyflavdnol 



and the trlmcthoxij flcn'oiiol. 



Kostanecki, St. von und Schleifen- 

 baum, 0. Berlin, Ber. D. chem. Ges., 

 37, 1904, (2631-2633). 



CYCLOID CujHibOr 



Trimethylbrazilone 



Reactions. 



Herzig, J. und PoUak, J. Wien, 

 MonHfte Chem., 25, 1904, (871-893). 



CYCLOID C^uHhO. 



Dimethyl-dioxy-ethinediphthalide. 



Liebermann, C. und Voswinckel, H. 

 Berlin, Ber. D. chem. Ges., 37, 1904, 

 (3344-3348). 



1, 3, 3',4'-Tetraoxyflavone 



(Lideolin) 



Synthesis. 



Painberg, S. und Kostanecki, St. von. 

 Berlin, Ber. D. chem. Ges., 37, 1904, 

 (2625-2627). 



CYCLOID CsHiaOs 



2', 4', 6', 3, 4-Pentaoxychalkone 



The 2'-oxY-4', 6', 3, 4-tetrametiioxy 



f'lIALKONE and 2'-ACET0XY TETEAMETIIOXY- 

 CHALKONE. 



Kostanecki, St. von und Tambor, .1. 

 Berlin, Ber. D. chem. Ges., 37, 1904, 

 (792-794). 



CYCLOID CnHieO,; 



T etraoxytetramethylxanthy drol 



CeMe,(Ori),<^"jyf^)>CsMe,(OIl), 



Tetra-acetyl derivative. 



Wenzel, F. und Schreier, A. Wien, 

 MonHfte Chem., 25, 1904, (6.57-681). 



CYCLOIDS C,9H,206 



Coumarin-keto-coumaric acid. 

 Knoevenagel, E. und Langensiepen, E. 

 Berlin, Ber. 1). chem. Ges., 37, 1904, 

 (4492-4496). 



9-Phenyl-2, 3, 7, 4'-tetraoxyfluorone 



also 



9-Phenyl-2, 3, 7, 2' tetraoxyfluorone 

 Liebermann, C. und Lindenbaum, S. 

 Berlin, Ber. D. chem. Ges., 37, 1904, 

 (2728-2737). 



CYCLOIDS CONTAINING SEVEN 

 OXYGEN ATOMS. 



CYCLOID CsHioOj 



1,3, 3', 4-Tetraoxyflavonol 



(Quercefin) 



also TETRAMETHOXYFLAVONOL. 



Kostanecki, St. von, Lampe, V. und 

 Tambor, J. Berlin, Ber. D. chem. Ges., 

 37, 1904, (^1402-1405;. 



CYCLOID Ci.H.sOt 



9-Phenyl-2, ?,, 7, 3'4'-pentoxyfluorone. 



Liebermann, C. und Lindenbaum, S. 

 Berlin, Ber. D. chem. Ges., 37, 1904, 

 (2728-2737). 



CYCLOID WITH EIGHT 

 OXYGEN ATOMS. 



CYCLOID C2nH,208 



Tetramethylhaematoxylone 



DlNrriiOTETRAAIETIlYI.IIAEMATiiXYl.ONE 



C2o'42oGl2^•2 



Reactions. 



Herzig, J. und Pollak, J. Wien, 

 MouHfte Chem., 25, 1904, (871-89.3). 



CYCLOID WITH NINE 

 OXYGEN ATOMS. 



CYCLOID CfiHeOg 



Oxobenzene 



(Bcnzenelrwzonide). 



Harries, C. und Weiss, V. Berlin, 

 Ber. D. chem. Ges., 37, 1901, (3431- 

 3433). 



