Starting from 3-bromo-4-formyl- or 3-bromo-4-cyano-2,2,5,5,-tetramethyl-2,5-dihydro-1H-pyrrol-1-yloxyl radicals, 2-substituted and 2,3-disubstituted 5H-selenolo[2,3-c]pyrrol-5-yloxyl radicals were synthesized. The 2-(bromomethyl)-substituted 5H-selenolo[2,3-c]pyrrol-5-yloxyl derivative was a key intermediate in the synthesis of a thiol specific methanethiosulfonate spin label reagent, a paramagnetic
从3-溴-4-甲酰基-或3-溴-4-氰基-2,2,5,5,-四甲基-2,5-二氢-1 H-吡咯-1-基氧基开始,被2-取代和合成了2,3-二取代的5 H-硒代[2,3 - c ]吡咯-5-基氧基。2-(溴甲基)-取代的5 H-硒代[2,3 - c ]吡咯-5-基氧基衍生物是合成巯基特异性甲烷硫代磺酸盐自旋标记试剂(一种顺磁性,亚硒环的氨基酸)的关键中间体,以及新的喹唑啉-4(3 H)-一衍生物。 氨基酸-烷基化-自由基-杂环-硒
Palladium-Catalyzed Cross-Coupling Reactions of Paramagnetic Vinyl Bromides and Paramagnetic Boronic Acids
Suzuki reactions are utilized for the synthesis of heterobifunctional cross-linking reagents (thiol- or aminospecific and photoactivatable), polyaromatics (such as phenanthrene) and heterocycles (such as coumarin and quinoline), anellated nitroxides and paramagnetic, biologically active molecules (such as cis-stilbene and nicotinamide). Furthermore, the synthesis of new vinyl and allyl boronic acid esters is also reported.
Reaction of β-Bromo-β,γ-unsaturated Pyrroline Nitroxide Aldehydes and Nitriles with Aromatic<i>N</i>,<i>S</i>-Binucleophiles
作者:Balázs Bognár、Boglárka Varga、Tamás Kálai、Viola Csokona、Gergely Gulyás Fekete、Cecília Sár、Kálmán Hideg
DOI:10.1002/jhet.2850
日期:2017.7
Reactions of β‐bromo‐β,γ‐unsaturated pyrroline nitroxide aldehyde (1) or nitrile (4) or their diamagnetic forms (5, 6) with 2‐aminothiophenol or 2‐mercaptobenzimidazole were evaluated. The reaction could be reproduced more easily with the application of O‐acetyl derivatives of nitroxides to generate 2‐substituted‐benzothiazole, pyrrolo[3,4‐b]benzo[1,5]tiazepine scaffolds with 2‐aminothiophenol and
评估了β-溴-β,γ-不饱和吡咯啉一氧化氮醛(1)或腈(4)或它们的抗磁性形式(5,6)与2-氨基硫酚或2-巯基苯并咪唑的反应。应用一氧化氮的O-乙酰基衍生物生成2-取代-苯并噻唑,吡咯并[3,4- b ]苯并[1,5]噻氮平骨架与2-氨基硫酚和苯并咪唑[2, 1 b ]吡咯并[3,4 e ] [[1,3]噻嗪支架与2巯基苯并咪唑。
3-Substituted 4-Bromo-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-1-yloxyl Radicals as Versatile Synthons for Synthesis of New Paramagnetic Heterocycles
作者:Tamás Kálai、Mária Balog、József Jekö、Kálmán Hideg