Highly efficient synthesis of 2,5-disubstituted pyrazines from (Z)-β-haloenol acetates
作者:Zhengwang Chen、Dongnai Ye、Guohai Xu、Min Ye、Liangxian Liu
DOI:10.1039/c3ob41164h
日期:——
A highly efficient synthesis of a wide range of 2,5-disubstituted pyrazines from (Z)-β-haloenol acetates is described. The reactions are conducted under convenient conditions and provide products with excellent regioselectivity in moderate to excellent yields with a broad substrate scope, including a variety of aromatic and aliphatic haloenol acetates.
Cycloaddition of Chlorosulfonyl Isocyanate to 2H-Azirines: Formation of [2+2+2] Cycloadducts
作者:Joseph Daniel、D. N. Dhar
DOI:10.1080/00397919108021065
日期:1991.8
Abstract Chlorosulfonyl isocyanata (CSI) reacts with 2H-azirines 1 a-c at -78°C to form [2+2+2] cycloadducts 3a-c and 4a-c. The tricyclic aziridine derivatives 4a-c undergo CSI extrusion reactions and subsequent oxidation to the corresponding pyrazines 5a-c. Structural identifications of 3a-c and 4a-c are based on ir, nmr and mass spectral data.
Collet, Bulletin de la Societe Chimique de France, 1901, vol. <3> 25, p. 930
作者:Collet
DOI:——
日期:——
REDDY P. A.; SRINIVASAN V. R., INDIAN J. CHEM., 1979, B 18, NO 6, 482-485
作者:REDDY P. A.、 SRINIVASAN V. R.
DOI:——
日期:——
Streamlined Routes to Phenacyl Azides and 2,5‐Diarylpyrazines Enabled by Deep Eutectic Solvents
作者:Paola Vitale、Luciana Cicco、Francesco Messa、Filippo Maria Perna、Antonio Salomone、Vito Capriati
DOI:10.1002/ejoc.201900722
日期:2019.9
Deep Eutectic Solvent like choline chloride/ glycerol (1:2 mol mol–1) proved to be an effective, sustainable reaction medium to easily synthesize both phenacyl azides and symmetrical 2,5-diarylpyrazines of interest in pharmacology and in coordination chemistry. Notable features of our report include: (i) nucleophilicsubstitutionreactions of α-halo carbonyl compounds to the corresponding phenacyl azides