Long-Lived<sup>1</sup>H Nuclear Spin Singlet in Dimethyl Maleate Revealed by Addition of Thiols
作者:Yuning Zhang、Pei Che Soon、Alexej Jerschow、James W. Canary
DOI:10.1002/anie.201310284
日期:2014.3.24
Singlet states are well isolated from the environment, such that they acquire long lifetimes. We describe herein a model reaction for read‐out of a hyperpolarized long‐lived state in dimethylmaleate using thiol conjugate addition. This type of reaction could lend itself to monitoring oxidative stress or hypoxia by sensitive detection of thiols. Similar reactions could be used in biosensors or assays that
Design of Reversible, Cysteine-Targeted Michael Acceptors Guided by Kinetic and Computational Analysis
作者:Shyam Krishnan、Rand M. Miller、Boxue Tian、R. Dyche Mullins、Matthew P. Jacobson、Jack Taunton
DOI:10.1021/ja505194w
日期:2014.9.10
that covalently modify a cysteine thiol often show enhanced pharmacological potency and selectivity. Although reversibleMichaelacceptors have been reported, the structural requirements for reversibility are poorly understood. Here, we report a novel class of acrylonitrile-based Michaelacceptors, activated by aryl or heteroaryl electron-withdrawing groups. We demonstrate that thiol adducts of these acrylonitriles