Orthophosphate and Sulfate Utilization for C–E (E = P, S) Bond Formation via Trichlorosilyl Phosphide and Sulfide Anions
作者:Michael B. Geeson、Pablo Ríos、Wesley J. Transue、Christopher C. Cummins
DOI:10.1021/jacs.9b01475
日期:2019.4.17
Anion 1 was also prepared from [TBA][H2PO4] and isolated in 62% yield on a gram scale. Treatment of [TBA]1 with an excess of benzylchloride leads to the formation of tetrabenzylphosphonium chloride, which was isolated in 61% yield. Sulfide 2 was used as a thionation reagent, converting benzophenone to thiobenzophenone in 62% yield. It also converted benzyl bromide to benzyl mercaptan in 55% yield. The
Synthesis of Nucleoside 5′-Tetraphosphates Containing Terminal Fluorescent Labels via Activated Cyclic Trimetaphosphate
作者:Samy Mohamady、Scott D. Taylor
DOI:10.1021/jo500051y
日期:2014.3.7
2'-Deoxynucleotide 5'-tetraphosphates in which a fluorescent label is attached to the terminal phosphate are used as key reagents in high-throughput DNA sequencing techniques and in single nucleotide polymorphism typing assays. We demonstrate that this class of compounds can be prepared by reacting fluorophores such as 7-hydroxy-4-methylcoumarin, methylfluorescein, fluorescein and resorufin with an activated form of cyclic trimetaphosphate to give intermediate 11. Reaction of 11 with 2'-deoxynucleoside 5'-monophosphates or a nucleoside 5'-monophosphate gave the target compounds in good yield.
Mechanistic Evaluation of a Nucleoside Tetraphosphate with a Thymidylyltransferase
作者:Stephanie M. Forget、Deborah A. Smithen、Alison Jee、David L. Jakeman
DOI:10.1021/bi501438p
日期:2015.3.3
Pyrimidine polyphosphates were first detected in cells 5 decades ago; however, their biological significance remains only partially resolved. Such nucleoside polyphosphates are believed to be produced nonspecifically by promiscuous enzymes. Herein, synthetically prepared deoxythymidine 5'-tetraphosphate (p(4)dT) was evaluated with a thymidylyltransferase, Cps2L. We have identified p(4)dT as a substrate for Cps2L and evaluated the reaction pathway by analysis of products using high-performance liquid chromatography, liquid chromatography and tandem mass spectrometry, and P-31 nuclear magnetic resonance spectroscopy. Product analysis confirmed production of dTDP-Glc and triphosphate (P-3) and showed no trace of dTTP-Glc and PPi, which could arise from alternative pathways for the reaction mechanism.
Synthesis of Nucleoside Tetraphosphates and Dinucleoside Pentaphosphates via Activation of Cyclic Trimetaphosphate
作者:Samy Mohamady、Scott D. Taylor
DOI:10.1021/ol4007822
日期:2013.6.7
A procedure for the synthesis of dinucleoside 5'-pentaphosphates (Np5N) and nucleoside 5'-tetraphosphates (Np-4) is described. The procedure relies on the activation of cyclic trimetaphosphate followed by a reaction with a nucleoside 5'-monophosphate (NMP) to give intermediates of type 3. Reaction of 3 with water or an NMP gives the desired products in yields ranging from 77 to 86%.
Oxygen atom transfer from O2 to a coordinated olefin: a new route to oxametallacyclobutanes
作者:V. W. Day、Walter G. Klemperer、S. P. Lockledge、D. J. Main