Cycloids containing oxygen. 814 



1911 



CYCLOIDS WITH SIX OXYGEN 

 ATOMS. 



CYCLOID C,H40r, 



2,3-Dioxypyrone <')-carboxylic acid 



Hydroxylamide of the dimethyl ether 

 HO.NH.CO.C<p|f^^pf,^>C.OMe 



Azzaxello. 



'CH . CO- 

 438S3. 



CYCLOID CgHsOe 



Dimethylpyrone dicarboxylic acid 



^ CMe : C{CO,ll) ^^ 

 Palazzo. 50321. 



Dl aud TETRA BROMO DERIVATIVES of the 



ethyl ester. 



Palazzo. Azioiie del bromo suU'etere 

 dimetilpirondicarbonico. G., 35, (465). 



CYCLOID CuHuOe 



Trimethylparaconylmalonic acid 



^'^<0"^CH ><^^fe-CO.CH(C02H)2 



Ethyl ester 

 and Hexamethyldiparaconylmalonic 



ESTER. 



Noyes. Am., 33, (356). 



CYCLOID CieHieOs 



MeC.CHj.C.O CO 



COjEt.C. CO.C.CMe:CAc 



Collie & Chrystall. [Compound, 

 CigHjeOg, obtained by the action of heat 

 on ethyl sodio-aeetoacetate, and the sub- 

 stance, CigHijOgBi-j, formed by the ac- 

 tion of bromine on it.] J.C, 91, (180l'). 



CYCLOID CtHigOs 



Oxymethoxyphenyl-'" meconine 



(0Me),C,H,<^g>U-^'^^3(0H).0Me 



Perkin, jun. & Robinson. 50479. 

 CYCLOID CoHibOb 



<f-Trimethylbrazilone 



XlTRO-DERlVATIVE Ci6H8(N02)03(OMe)3 



and the mono.m ethyl ether 



Ci6H,(N02)02(OMe), 



Herzig u. PoUak, J. M., 27, (743). 



CYCLOID C.uHmO,, 



Pyrocatecholphthalein 



co<^«^^>C[Ceri3(on)2] 



o 



and tlie acetate. 



B., 40, 



Meyer u. Pfotenhauer, H. 



(1442). 



CYCLOIDS WITH SEVEN OXYGEN 

 ATOMS. 



CYCLOID C7H4O7 



Meconic acid C,UO,((m)(CO,ll), 



Mallinckrodt, jun. & Dunlap. Me- 

 conic acid in tlie U.S.P. 1890 assay of 

 opium, and certain meconates. Am. Soc, 

 27, (946). 



CYCLOID C2nH2o07 



»f'-Tetramethylhaematoxylone 



DiNITRO derivative 



C,6He(NO,)203(OMe)4 



and nitro derivative of the methyl ether 



CieH,(NU2)0,(0Me)s 



Herzig u. PoUak, J. M., 27, (743). 



CYCLOIDS WITH NINE OXYGEN 

 ATOMS. 



CYCLOID C19H20O9 



Dihydrobrazilinic acid 



Lactone 



(O.Je)2C6H2<^y>0 

 O.CH,.CO,H 



Perkin, jun. 

 Synthesis. 



& RoMnson. 50479. 



CYCLOIDS WITH TEN OXYGEN 

 ATOMS. 



CYCLOID C2oH»Oio 



Dihydrohasmatoxylinic acid 



Lactone. 

 & Robinson. 



50479. 



Perkin, jun. 

 Synthesis. 



CYCLOIDS WITH ELEVEN OXYGEN 

 ATOMS. 



CYCLOID CuHeOn 



Furfurylidene-bis-acetone- 

 dicarboxylic acid 



I'JTIIYI, ESTER. 



Petrenko-Kritschenko u. Lewin, M, 

 B., 40, (2882). 



