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
Syntheses and Reactions of Pyrroline, Piperidine Nitroxide Phosphonates
Horner-Wadsworth-Emmons (HWE) reactions. The reaction of paramagnetic α-bromoketone produced a vinylphosphonate in the Perkow reaction. Paramagnetic α-hydroxyphosphonates could be subjected to oxidation, elimination and substitution reactions to produce various paramagnetic phosphonates. The synthesized paramagnetic phosphonates proved to be useful synthetic building blocks for carbon-carbon bond-forming reactions
Starting from paramagnetic β-bromo-α,β-unsaturated aldehyde 1, β-bromo-α,β-unsaturated nitrile 2 and diene 3 heterocycles 4-10 and carbocycles 12-14, 16, and 17 were synthesized with simple procedures in the presence of a nitroxide moiety. A complex-forming paramagnetic phenanthroline 19 is also described.
Controlling biofilms on cultural materials: the role of 3-(dodecane-1-thiyl)-4-(hydroxymethyl)-2,2,5,5-tetramethyl-1-pyrrolinoxyl
作者:Stefanie-Ann Alexander、Emma M. Rouse、Jonathan M. White、Nicole Tse、Caroline Kyi、Carl H. Schiesser
DOI:10.1039/c4cc08390c
日期:——
3-(Dodecanethiyl)-4-(hydroxymethyl)-2,2,5,5-tetramethyl-1-pyrrolinoxyl (5) effectively disperses biofilms of relevance to cultural materials while preventing their formation.
Blue ‘turn-on’ fluorescent probes for the direct detection of free radicals and nitric oxide in Pseudomonas aeruginosa biofilms
作者:Mina Barzegar Amiri Olia、Athanasios Zavras、Carl H. Schiesser、Stefanie-Ann Alexander
DOI:10.1039/c5ob02441b
日期:——
Two novel cell-permeable and bacteria-compatible ‘turn-on’ fluorescent probes, designed to be compatible in a multi-dye system and to fluoresce in the blue region exhibiting emission maxima of 440–490 nm, were synthesized. The profluorescent nitroxide probe (11) was developed to visualize and quantify freeradical and redox processes, and the Cu(II)-complexed coumarin-based probe (16a) was developed