<i>N</i>-Ammonium Ylide Mediators for Electrochemical C–H Oxidation
作者:Masato Saito、Yu Kawamata、Michael Meanwell、Rafael Navratil、Debora Chiodi、Ethan Carlson、Pengfei Hu、Longrui Chen、Sagar Udyavara、Cian Kingston、Mayank Tanwar、Sameer Tyagi、Bruce P. McKillican、Moses G. Gichinga、Michael A. Schmidt、Martin D. Eastgate、Massimiliano Lamberto、Chi He、Tianhua Tang、Christian A. Malapit、Matthew S. Sigman、Shelley D. Minteer、Matthew Neurock、Phil S. Baran
DOI:10.1021/jacs.1c03780
日期:2021.5.26
taking a first-principles approach guided by computation, these new mediators were identified and rapidly expanded into a library using ubiquitous buildingblocks and trivial synthesis techniques. The ylide-based approach to C–H oxidation exhibits tunable selectivity that is often exclusive to this class of oxidants and can be applied to real-world problems in the agricultural and pharmaceutical sectors
Cation-π Interactions at the Active Site of Factor Xa: Dramatic Enhancement upon Stepwise N-Alkylation of Ammonium Ions
作者:Laura M. Salonen、Christoph Bucher、David W. Banner、Wolfgang Haap、Jean-Luc Mary、Jörg Benz、Olivier Kuster、Paul Seiler、W. Bernd Schweizer、François Diederich
DOI:10.1002/anie.200804695
日期:2009.1.12
inhibitors of factorXa features a quaternary ammoniumion to fill the aromatic box in the S4 pocket and a 2‐chlorothiophenyl group to occupy the S1 pocket (see picture; red O, blue N, yellow S, green Cl). Changing from a primary to a quaternary ammoniumion increases the binding affinity by a factor of 1000. The poor affinity in the former case suggests negligible cation–πinteractions between Lys and
Development of fluorescent probes specific for parallel-stranded G-quadruplexes by a library approach
作者:Liyun Zhang、Jun Cheng Er、Xin Li、Jun Jie Heng、Animesh Samanta、Young-Tae Chang、Chi-Lik Ken Lee
DOI:10.1039/c5cc01601k
日期:——
A novel fluorescent sensor with super selectivity to G-quadruplexes was discovered by the library approach.
通过文库方法发现了一种对G-四链体具有超强选择性的新型荧光传感器。
Radical Ring Closures of 4-Isocyanato Carbon-Centered Radicals
作者:Patricia L. Minin、John C. Walton
DOI:10.1021/jo034002o
日期:2003.4.1
The 2-(2-isocyanatophenyl)ethyl radical was generated from the corresponding bromide with tributyltin and tris(trimethylsilyl)silyl radicals and shown to ring close in the 6-endo-mode to afford 3,4-dihydro-1H-quinolin-2-one as the major product. Cyclization in the 5-exo-mode to produce 2,3-dihydroindole-1-carbaldehyde, after hydrogen abstraction, was a minor reaction. Rate constants for the two processes
We here report the affinity purification of N-acylhomoserine lactone synthases using beads conjugated with an enzyme inhibitor, which was designed based on the catalytic intermediate acyl-SAM.