82627-60-9Relevant academic research and scientific papers
On the Silylation of Bifunctional Amidines of Oxalic Acid
Beckert, Rainer,Vorwerk, Steffen,Lindauer, Dirk,Doering, Manfred
, p. 1386 - 1390 (2007/10/02)
N,N',N'',N'''-Tetraaryl-oxalic amidines react with N-trimethylsilyldiethylamine to yield the activated and open chained derivatives 3a, b.By the use of diorganyldichlorosilanes the new 1,3-diaza-2-sila-cyclopentanes 5a-d were obtained.Cycloacylations of 3
1,3-Acylrearrangements by Cyclisation of Thioureas with Imidochlorides of Oxalic Acid - An Approach to interesting Thiocarbonylic Systems
Beckert, R.,Gruner, M.
, p. 611 - 618 (2007/10/02)
By cycloacylation of various substituted thioureas with bis-imidochlorides of oxalic acid the new thiazolidines 3, 4 and isomeric imidazolidines 5, 6 are obtained.Especially when triethylamine is used as a base the main products are the deeply coloured 4-
Derivatives of Imidazolidines from Oxalic Amidines
Beckert, R.,Mayer, R.
, p. 227 - 236 (2007/10/02)
Tetraarylsubstituted oxalic amidines 1 react with acyl chlorides, phosgene, thiophosgene, chlorocarbonylsulfenylchloride, isocyaniddichlorides, and N-aroyl-1-chlorothio-formimidoylchlorides 7 to give the corresponding 5-membered heterocycles 3,4,5 and 8.Isocyanates 9 and isothiocyanates 10 react with oxalic amidines to yield imidazolidines 11, 12 and ureas 13, 14.Hydrolysis of 3-5, 8, 11, 12 leads to the corresponding oxo compounds 15, 16.
