Cycloids containing nitrogen. Sil 



1932 



CYCLOIDS WITH TWO XITROGEN 

 ATOMS AND OXYGEN. 



CYCLOID C3H4ON2 



Pyrazolone 



4-NlTRO-5-PYUAZOLOXE 



,N : OH 

 ~CO.CH.NO2 

 HiU & Black. Am., 33, r292j. 



XH<' 



CYCLOID C4H2O4N2 



Tetraketopiperazine 



^^H<S:CO>^'Hor 



^-^C(OH).CO jj^ 



Mouilpied & Rule. [Mono- and di- 

 sodiuni salts, silver salt and phenyl- 

 hydrazone.] .I.C, 91, (176). 



CYCLOID C4H40N2 

 Oxypyrimidine. 



6-OXY-2-AMIXOPYIUMIDINE 



BenzyJidene derivative 

 xTR^C(X:CHPli):N^.,^ 



^^<cb lcH>'-^ 



Johnson & Johns. Am., 34, f.554). 



5-XlTRO-G-OXY-2 AMINOPYIilMIDINE 



*^^<C0.C(N02)^'-^ 

 Johnson & Johns. Am., 34, (554). 



5-Br05IO-(; OXY-2-PHENYLA.MINOl'YliI.MIDIXE 



,^-jj C(NHPh):N 

 CO.CBr : CH 

 Wheeler & Bristol. Am., 33, (437). 



C-OxY-2, 5-DIAMlNOPYRIMIDINE 



^^^^CO.CiNHj)^^" 



and its heuzoyl derivative. 



Johnson & Johns. Am., 34, (554). 



2-0xY-G-AMIN(M'YniMIDISE 



Cldoro-bromo-dcrivative 



^<C;NlI.,).CUr^'"^^ 

 Johnson & Johns. Am., 34, (175). 



CYCLOIDS C4H4O2N2 



a-Isouracil 



CO<|^icH>C.OH 



/3-Isouracil 



CO<^'EfcH>^0 



Tafel u. Houseman, R. A. B., 40, 



(374.3;. 



CYCLOID C4H4O3N2 



Barbituric acid 



Whiteley. 1 : 3-Diphenyl1iarhitiiiic 

 acid and some coloured derivatives. 

 J.C, 91, (1330j. 



CYCLOID C4H6ON2 



Methylglyoxalidone 



CH3C<^^ • ^"*^ 

 NH.CH2 



and the dihenzoyl derivative. 

 Finger, H. J. pr., 76. (93). 



CYCLOID C4H6O2N2 



Hydrouracil 



Franchimont et Friedmann. 4G245. 



Action de I'acide azotique reel. 



CYCLOID C4H8ON2 



Trimethylene-ureine 



^""^<cfi::Nll>c« 



Franchimont et Friedmann. 40245. 

 Actioia de I'acide azotique reel. 



CYCLOID C.H4O4N2 



Orotic acid 

 /NH-CO— CHj 

 C0< ! 



\XH— CO— CO 



Biscaro e Belloni. 4 1. ;'.'.) 7. II. 

 CYCLOID CsHoON. 



Dimetliylglyoxalone 

 C113.C.N11 

 CHj.C.NH 

 and its diacetate. 

 BUtz, H. B., 40, (17'Jl)). 



