3746-45-0Relevant academic research and scientific papers
HETEROCYCLOALKYLATION OF BASES WITH XANTHYLIUM AND THIOXANTHYLIUM SALTS
Ivanov, G. E.,Pavlyuk, G. V.,Turov, A. V.,Ryzhakov, M. K.
, p. 752 - 755 (2007/10/02)
Xanthylium and thioxanthylium perchlorates convert tertiary amines into quaternary salts having xanthene and thioxanthene residues at the nitrogen atom.When these reagents are used, the heterocycloalkylation of amines, amides, sulfonamides, imides, and alcohols is not accompanied by disproportionation.
Nitrogen-15 NMR Evidence for the Structures of N-9 H-Xanthen-9-yl- and N,N'-Di-9H-xanthen-9-yl-Ureas
Coxon, Bruce,Fatiadi, Alexander J.,Cohen, Alex,Hertz, Harry S.,Schaffer, Robert
, p. 187 - 192 (2007/10/02)
A new monoxanthen-9-yl derivative of urea has been synthesized and the structure of this product (N-9H-xanthen-9-ylurea) and that of the previously known N,N'-di-9H-xanthen-9-ylurea have been proved by 15N NMR and other spectroscopic techniques.A series of 13C and 15N labeled urea derivatives has been prepared and the utility of their 13C and 15N chemical shifts and coupling constants in the structural analysis of urea derivatives has been investigated.
