Cycloids containing oxygen. 811 



1911 



CYCLOID CnHieOa 



O TT ^ CH.CHj.CO.CeH.Me 



CO. 

 From naiahthaldehydic acid and /n-tolyl 

 methyl ketone. Also its oxiUE and 



PIIENVLHYDRAZONE. 



Wiechowski, S. il., 26, (749). 

 CYCLOIDS C2,H,603 



i, 1 i-DiiTiethyl-9-coeroxonol 



and the methyl and ethyl ethers and 



ACETATE. 



Decker u. Fellenberg-, S. von. A., 

 356, (281). 



3,6-Dimethylfluorane 



C6H4 -^.p -.-t'ells^Ie^.^n 

 C0.0^^^CeH3lle>''' 



Bentley, Gardner, jun. & Weizmann, 

 ■C. J.C., 91, (1G:.'6). 



CYCLOID C^H.eOs 



4'-Isopropyl-a-naphthaflavonole 



CO.C.OH 

 Kostanecki, St. von. B., 40, (3G69). 



CYCLOID C23H,803 



Xanthylbenzoylacetone 



OiCsIIJaCH.CHAcBz 

 Fosse. BI., 35, (1005). 



CYCLOID C24HMO3 



From naphthaldehydic acid and 

 acenuphthenone. 

 Wiechowski, S. M., 26, (749). 



CYCLOID C.4H,„03 



2:4:5: 7-TetramethyIfluorane 



(!0.()>^<CVH,Me>^^ 



Bentley, Gardner, jun. & Weizmann. 

 •C. J.C., 91, (ItL'O). 



CYCLOID C,cH,„03 



Dinaphthapyrylacetyiacetone 



Fosse. Bl., 35, (1005). 

 (D-853G) 



CYCLOID C3,H2:03 



Dinaphthapyrylbenzoylacetone 



0<p'°[J^>OH.CHAcBz 



Fosse. BL, 35, (1005). 



CYCLOIDS WITH FOUR OXYGEN 

 ATOMS. 



CYCLOID C4H,04 



Oxymaleic anhydride 



CH — CO 



C(OH).CO>^ 



Worn 11. Freund, W. B., 40, (2300). 



CYCLOID C4H304 



Erythronic lactone 

 HO.CH,.CO 

 HO.CH^.CHj^'^ 

 Lespieau. 1^1., 1, (1112). 



CYCLOID C7H10O4 



Terebic acid CMe,.CH.CO,H 

 0.CO.CH2 



Simonsen. Synthesis. J.C., 91, (184). 

 CYCLOIDS CsHsO^ 



Dehydracetic acid 



CH3.C0.CH,.C<[^-^^>CH, 



2-Methylpyrone-6-acetic acid 



C02H.CH,.C<2J;J!^>CH 



Collie & Hilditch. An isomeric 



change of dehydracetic acid [into 2- 



methyl-pvrone-6-acetic acidl. J C . 91 



(787). • ■• • 



CYCLOIDS C,H,204 



Trimethylparaconic acid 

 Chloiude 

 Q^CO . CMe^ 



CITj.ClIe.COCl 

 Noyes. Am., 33, (356). 



Terpenylic acid CMe^ .CH.CH,.C0,H 

 0.CO.CH2 



Simonsen. Synthesis. J.C., 91, (184). 

 CYCLOID C,Hm04 



Homoterpenylic acid 

 C.\ie2.CH.CH.,.Cil2.C02H 

 O.CO.CHj 



and its ethyl ester. 



Simonsen. Synthesis. J.C 91 



(184). • •' ' 



3 H 



