100784-89-2Relevant academic research and scientific papers
DBU-promoted tandem Michael-addition/cyclization for the synthesis of polysubstituted pyrroles
Yang, Tianyu,Wang, Ke-Hu,Huang, Danfeng,Li, Pengfei,Deng, Zhoubin,Su, Yinpeng,Hu, Yulai
, p. 2291 - 2297 (2019/03/06)
An efficient and transition-metal-free method for the synthesis of the structurally diversified pyrroles is described. Various α,β-unsaturated ynones reacted with N-substituted ethyl glycine ethyl ester hydrochlorides in the presence of DBU to form the co
OBO-Protected Pyruvates as Reagents for the Synthesis of Functionalized Heteroaromatic Compounds
Alves Esteves, C. Henrique,Koyioni, Maria,Christensen, Kirsten E.,Smith, Peter D.,Donohoe, Timothy J.
supporting information, p. 4048 - 4051 (2018/07/15)
Pd-catalyzed α-arylation of methyl-OBO-ketone (OBO = 4-methyl-2,6,7-trioxabicyclo[2.2.2]octan-1-yl) gives rise to arylated OBO-protected pyruvates. By appropriate prefunctionalization of the aryl ring or by subsequent functionalization at the α-carbonyl p
Transition Metal-Free Synthesis of 3-Alkynylpyrrole-2-carboxylates via Michael Addition/Intramolecular Cyclodehydration
Teng, Qing-Hu,Xu, Yan-Li,Liang, Ying,Wang, Heng-Shan,Wang, Ying-Chun,Pan, Ying-Ming
, p. 1897 - 1902 (2016/07/06)
A transition metal-free and efficient method for the synthesis of 3-alkynylpyrrole-2-carboxylates from diynones and glycine esters or 2-aminoacetophenone hydrochloride has been developed. This transformation provides a large range of substituted pyrroles in good to excellent yields with the elimination of water as the only by-product. The detailed mechanistic studies elucidated that this transformation involves a Michael addition/intramolecular cyclodehydration process. (Figure presented.) .
The Synthesis and Chemistry of Azolenines. Part 4. Preparation and Rearrangement of some 3,5-Diaryl-2H-pyrrole-2,2-dicarboxylic Esters
Sammes, Michael P.,Chung, Margaret W. L.,Katritzky, Alan R.
, p. 1773 - 1780 (2007/10/02)
Oxidation of diethyl 3,5-diaryl-3,4-dihydro-2H-pyrrole-2,2-dicarboxylates (3) with chloranil in refluxing xylene gives not the 3,5-diaryl-2H-pyrrole-2,2-dicarboxylates (4) as reported by an earlier group, but instead the rearranged, isomeric, 1H-pyrrole-1,2-dicarboxylates (5). 2H-Pyrroles (4) may be obtained from the dihydropyrroles (3) using DDQ in benzene at room temperature; they rearrange to the isomers (5) in boiling xylene via an acyl -sigmatropic shift from carbon to nitrogen, a novel process in the 2H-pyrrole series.Thermal analyses indicate that the rearrangement is concerted with negligible charge separation in the transition state.Other novel 3,5-diaryl-1H-pyrrole-2-carboxylic acid derivatives are described.
