1910 



1910 



CYCLOIDS CONTAiyiXG FOUR 

 OXYGEN ATOMS. 



CYCLOID CeH.O^ 



Oxymethylparamucic acid 



CH:C(CO,lI) 

 CH : C(CH2 . OH) 

 and its acetyl derivative CgHgOj 



Fischer, E. luid Andreae, E. Berlin, 

 ler. D. cheni. Ges , 36, 1903, (2'>S1- 



rj\y2). 



CYCLOID C H,04 



Dioxyanhydroglycogallol 



Dimethyl derivative. 



C'eH3(OMe)2<^Q>CH, 



Perkin, A. (i. and Wilson, C. 11. 

 [Dimethox^-anhydroglycogalloi, and its 

 monopotassiuni derivative ; also the 

 action of protocatechuic aldehvde on it. 

 London, J. Chem. Soc. 83, 1903, (137- 

 138); [Abstract] Proc. Chem. See., 18, 

 1002, (215). 



CYCLOIDS C3H,204 



Oxytrimethylglutaric acid. 



Lactone 



°<CH(C02H) >^-^^^2 

 and 

 Lactone 

 -CO . CH, 



'^<CMe(C03H)>^-'^^^2 

 ano, L. Gazz. chi 



ital. 



rMi'imo, 32, parte 1, 1902, (485-494). 

 CYCLOIDS CjH,04 



3, 4-Dioxycliromone 



(ho)ah,<°q;?| 



and its dimethyl ktiiei;. 



David, E. und Kostanecki, St. von. 

 Horlin, Rer. D. chem. lies., 36. 1903, 

 (125-129). 



1 ^-Dioxychromone 



L U " ^^ ''^CO.CH 



Ruijter de Wildt, J[ohannes] C[atlieri- 

 nusj de. Synthese des 1.3-dioxychro- 

 inons. Leiden (J. J. Groen en Zo-m), 

 1902, (15). 



CYCLOID C H O4 



Furylidene-acetoacetic acid 



.Me.C0.C(C0,H):GH.(\H30 



Ruhemaam, S. [The action of ammonia 

 on etlivl lurylideneacetoacetate. London, 

 J. Chem. Soc, 83, 1903, (374-378); 

 [Abstract] Proc. Chem. Soc, 19, 1903, 



(50). 



CYCLOID CuH.Oi 



Dioxymethylbenzopyrone 



{3,i-Dioxy-fi-inelhylcliromonc 



C6H2(OH)2<^ -9.^® 



also its 'liacet)jl a7id JimclJi i/l derivathes^ 



Blumberg, :\I. und Kostanecki, St. von. 

 Berlin, Ber. D. chem. Ges., 36, 1903„ 

 (2191-2193). 



>0 



LACTONIC ACID Ci.Hm04 



CH(C02Et) . C.Me2 

 C(:CMe2) .CO 

 Ethyl ester Ci2H,804 



StoUe, IL J. prakt. Chem., Leip/irr, 

 N'.K.), 67, 1003, (197-190). 



CYCLOIDS C14H3O4 



Naphthacoumarin carboxylic acids 

 (- TT^<^— CO , 



''»^^<CH:C.CO.,H*'^"'^ 



C.oHe< 



-CO 



C(C03H) : CH 

 Ethyl ester-f 



Bartsch, Kurt. Berlin, Ber. D. cliein 

 Ge.., 36, 1003, (19C0-l<.»7n). 



CYCLOID C,.H, 0* 



Dioxyflavone 



. GPh 



(HO)2Cerr2<,.^ -.-jj 



also mvetiioxyflavoke, C„HhU4 

 and dimetiioxyflavakone Ci,H,„()^. 



Woker, G. Kostanecki. St. von vuA 

 Tambor. .1. Berlin, Ber. D ehem (;es 

 36. 1!I0;!, (42;{5-42in. 



