28478-57-1Relevant academic research and scientific papers
Studies on pyrrolidinones. On the carbamoylation of some pyroglutamic derivatives
Cauliez, Pascal,Fasseur, Dominique,Couturier, Daniel,Rigo, Benoit,Kolocouris, Antonios
, p. 1233 - 1237 (1996)
The carbamoylation of some lactams derivatived from pyroglutamic acid has been studied; better yields were obtained starting from the unsubstitued lactam (toluene, 80°) rather than starting with the N-silyllactam (room temperature), although these latter reaction conditions could be interesting for heat sensitive compounds. Methyl and phenyl isothiocyanate react only with the sodium salt of methyl pyroglutumate, giving 1,5-diaddition products.
Iron(II)-catalyzed oxidation of sp3 C-H bonds adjacent to a nitrogen atom of unprotected arylureas with tert-butyl hydroperoxide in water
Wei, Ying,Ding, Hongqian,Lin, Shaoxia,Liang, Fushun
supporting information; experimental part, p. 1674 - 1677 (2011/05/13)
With a FeSO4/TBHP system in water, direct oxidation of sp 3 C-H bonds adjacent to nitrogen of arylureas to give both unprecedented tert-butoxylated and hydroxylated products 2 was revealed. Under elevated temperatures, either 2-oxo-N-arylpyrrolidine-1-carboxamides 3 or 1,3-diarylureas 4 were attained, depending on the aliphatic ring size of the arylurea substrates.
Synthesis, decarboxylation, and nitrosation of 1-acyl-2-pyrrolidone-3-carboxylic acids: A convenient novel entry to 2,3-dioxopyrrolidine derivatives
Gailius,Stamm
, p. 89 - 92 (2007/10/02)
Esters 1 of 1-acyl-2-pyrrolidone-3-carboxylic acids 2 were hydrolized to 2 with acetic acid/HCl at 60-70°C. Reaction of 1a with formic acid/HCl at 60-75°C led to (not isolated) 2a which began to decarboxylate to 3a during the conversion of 1a to 2a even a
Reactions of N- or N'-Blocked N-acylureas with Amines
Schweim, Harald G.
, p. 430 - 437 (2007/10/02)
In order to make reactions of N-acylureas with amines more selective N- or N'-blocked derivatives were prepared.Their fragmentation was examined.
