作者:Stephanos Ghilagaber、William N. Hunter、Rodolfo Marquez
DOI:10.1039/b613656g
日期:——
The first enantioselective synthesis of C3 fluoro-MEP is herein reported. The synthetic pathway developed takes advantage of a selective hydrofluorination of a 2,3-epoxy-1-alcohol to introduce the required tertiary fluoride unit.
Electrochemical phosphorylation of arenols and anilines leading to organophosphates and phosphoramidates
作者:Zijian Zhong、Pan Xu、Aihua Zhou
DOI:10.1039/d1ob00779c
日期:——
A practical phosphorylation for generating organophosphates and phosphoramidates via electrochemical dehydrogenative cross-coupling of P(O)H compounds with arenols and anilines is disclosed. This method involves using inorganic iodide salts as both redox catalysts and electrolytes in an undivided cell without the addition of oxidants or bases. A preliminary mechanistic study suggests that radicals
study on the iodine-mediated phosphoramidation reaction of amines and trialkyl phosphites was conducted, which not only disclosed the factors affecting the reaction but also revealed that it could proceed smoothly in CH2Cl2 at room temperature in open air. Using this method, various phosphoramidates with different aliphatic amines and aromatic amines were synthesized in good to excellent yields. Our
Substrate and reaction intermediate mimics as inhibitors of 3-deoxy-d-arabino-heptulosonate 7-phosphate synthase
作者:Scott R. Walker、Hemi Cumming、Emily J. Parker
DOI:10.1039/b909241b
日期:——
3-Deoxy-D-arabino-heptulosonate 7-phosphate (DAH7P) synthase catalyses the aldol-like addition of phosphoenolpyruvate (PEP) to D-erythrose 4-phosphate in the first step of the shikimate pathway to aromatic amino acids. A series of compounds, designed to mimic intermediates in the enzyme-catalysed reaction, have been synthesised and tested as inhibitors for the DAH7P synthase from Escherichia coli. The most potent inhibitor was the vinyl phosphonate, (E)-2-methyl-3-phosphonoacrylic acid, with a Ki of 4.7 µM.
Triethylphosphite and elemental iodine in solution give transient iodotriethyl-phosphonium iodide which eliminates ethyl iodide to form diethyl phosphoroiodidate. An examination of the 31P NMR and IR spectra over the temperature range −100° − 0°C fails to disclose any evidence for triethoxydi-iodophosphorane, contrary to a previous claim.
亚磷酸三乙酯和元素碘在溶液中产生瞬时的碘代三乙基-碘化碘,它消除了碘乙烷,形成了磷酸二乙酯。与以前的权利要求相反,在-100°-0°C的温度范围内对31 P NMR和IR光谱的检查未能揭示三乙氧基二碘代磷烷的任何证据。