56674-27-2Relevant academic research and scientific papers
Catalyst-free synthesis of N -(1,7-dioxotetrahydropyrazolo[1,2-a]pyrazol-2- yl)benzamide derivatives by 1,3-dipolar cycloaddition and rearrangement
Liu, Wenjing,Xu, Yu,Sun, Xingxia,Lu, Dapeng,Guo, Lijuan
, p. 1093 - 1096 (2014)
N-(1,7-Dioxotetrahydropyrazolo[1,2-a]pyrazol-2-yl)-benzamide derivatives, a novel class of compounds, were synthesized by 1,3-dipolar cycloaddition of azomethine imines with azlactones and subsequent rearrangement. The reaction can be completed rapidly under mild conditions without a catalyst. Georg Thieme Verlag Stuttgart New York.
Enantioselective iridium catalyzed α-alkylation of azlactones by a tandem asymmetric allylic alkylation/aza-Cope rearrangement
Bai, Xue-Dan,Zhang, Qing-Feng,He, Ying
supporting information, p. 5547 - 5550 (2019/05/21)
The development of an iridium catalyzed enantioselective α-alkylation of azlactones has been described. The reaction provides rapid access to a wide range of enantio-enriched quaternary carbon center allylated 2,4-diaryloxazol-5(2H)-ones in excellent yiel
5-Oxazolones, IV Reactions of 5(4H)-Oxazolones with Triphenylphosphonium Methylides
Erba, Emanuela,Gelmi, Maria Luisa,Pocar, Donato
, p. 1519 - 1524 (2007/10/02)
The Wittig reaction of ethyl (triphenylphosphoranylidene)acetate (2a) with the carbonyl group of trisubstituted 5(4H)-oxazolones 1a-c afforded ethyl 5(4H)-oxazolylideneacetates 3a-c and triphenylphosphane oxide.Starting from oxazolones 1d-i and ylide 2a, methyleneoxazoles 3d, e and ethyl 5-oxazoleacetates 4a-f were obtained besides ylides 5a-e deriving from the nucleophilic attack of the ylide at 1 and subsequent opening of the oxazole ring.Oxazolones 1a-c reacted also with triphenylphosphonium phenylmethylide (2b) to yield methyleneoxazoles 3f,g and ylides 5f-h.By treating triphenylphosphonium methylide (2c) and -methoxymethylide (2d) with 1a-c only open-chain compounds 5i-k and 5l-n, respectively, were obtained.
