Cycloids containing nitrogen. 



1932 



DiniioMiDE CeH^OXjBi-j and its 

 eon'h'iiKdtiou 'products with aldehydes. 



Stark, 0. B., 42, (708). 



CYCLOID CbHsOzNj 



/3-Imidazylpropionic acid. 



a-Cni,()UO and a-METHOXY DERIVATIVES. 



Gerngross, 0. B., 42, (403). 

 CYCLOID C7H,>0,N2 



Methylethyldiketopiperazine 



Rosenmund, K W, B., 42, (-1475). 

 CYCLOID CaHfO^Nz 



Benzoylene-carbamide 



NH.CO 

 Haslinger, C. B., 41, ( 1444). 



CYCLOID C HON: 



a-Metliy.benzopyrazolone 



Milrath. M. 29, (929). 



CYCLOID C HsONs 



Glutazylacetic acid 



also the rARBETiioxY derivative. 

 Best & Thorpe. G43G5. 



CYCLOIDS CoHnOiN. 



Diethyldiketopiperazine 



Rosenmund, K. W. 1'., 42, (4477). 



Glycyl-tl-isoleucine anliydride- 

 Abderhalden, Hirsch u. Schuler. B., 

 42, .340(3). 



CYCLOID CiHifON; 



Tetramethyltetraliydropyrimidone 



Kobn u. Morgenstern. M., 29, (522). 

 CYCLOID C.-HsONz 



3-Phenyl-5-pyraz olone 



4-IsONITROSO DERIVATIVE 



,N : CPk 

 ~C0. C : N.OH 

 Muckermann. B., 42, (3456). 



CYCLOID C.HuONj 



5-Phenyl-3 pyrazolidone 



]-N'lTR().SO DERIVATIVE 



^,^^ CIll'h.CH, 

 XII — CO 

 Muckermann, E. B., 42, (3454). 



CYCLOID CgHi.OjNj 



(1-Alanyl-il-isoleucine anhydride. 

 Abderhalden, Hirsch u. Schuler. B., 

 42, (340Sj. 



CYCLOID CioHisOjNj 



Bis-Methylethyldiketopiperazine 



Rosenmund, K. W. B., 42, (4475). 

 CYCLOID CnH.ONz 



Dihydro perimidone 2 



(cycl. peri-napJtthyletiPcarbamidc) 

 C\oHa<|{5>CO 

 Sachs. A., 365, (135). 



CYCLOID ChHkONs 



Antipyrine. 



AZOANTIPYRI.VE. 



.NMe.CMe 



CMe.NMe^ 



Ph.N 



>NPh 



NH<^ 



\C0-C— N : N— C CO'' 



Forster & Miiller. CCJSl. 



CYCLOIDS CnH fO.Nj 



Valyl leucinanhydride. 

 Leucyl valylanhydride. 



Krause. ()S072. 



Skraup. 71143. Produkte der Hydro- 

 lase von Casein. 



CYCLOID CnH ON. 



9-Quino-2-methylperimidine. 



Kehrmann, F. u. Engelke, E, F. B.. 

 42, '352. 



CYCLOID Ci:H,04N2 



4-Phenylcinnolinic acid 



[ArPhcnylpyridazhie ofi-dicnvboxylic 



acid). 

 Stoermer u. Fincke. B., 42, (,3128j. 



