Donor–Acceptor Complex Enables Alkoxyl Radical Generation for Metal‐Free C(sp
<sup>3</sup>
)–C(sp
<sup>3</sup>
) Cleavage and Allylation/Alkenylation
作者:Jing Zhang、Yang Li、Ruoyu Xu、Yiyun Chen
DOI:10.1002/anie.201707171
日期:2017.10.2
The alkoxyl radical is an essential and prevalent reactive intermediate for chemical and biological studies. Here we report the first donor–acceptor complex‐enabled alkoxyl radical generation under metal‐free reaction conditions induced by visible light. Hantzsch ester forms the key donor–acceptor complex with N‐alkoxyl derivatives, which is elucidated by a series of spectrometry and mechanistic experiments
Alkylation of Allyl/Alkenyl Sulfones by Deoxygenation of Alkoxyl Radicals
作者:Jia-Bin Han、Ao Guo、Xiang-Ying Tang
DOI:10.1002/chem.201806138
日期:2019.2.26
challenging deoxygenation of alkoxyl radicals from readily accessible alcohol derivatives was developed, affording facile synthesis of functionalized alkenes with good functional group tolerance under mild reaction conditions. Because alkoxyl radicals can easily undergo β‐fragmentations or hydrogen abstractions, this new strategy for deoxygenation of alkoxyl radicals is highly valuable. Moreover, mechanistic
Phosphinic acid-based MMP-13 inhibitors that spare MMP-1 and MMP-3
作者:Lawrence A. Reiter、Peter G. Mitchell、Gary J. Martinelli、Lori L. Lopresti-Morrow、Sue A. Yocum、James D. Eskra
DOI:10.1016/s0960-894x(03)00413-x
日期:2003.7
Phosphinic acid-based inhibitors of MMP-13 have been investigated with the aim of identifying potent inhibitors with high selectivity versus MMP-1. Independent variation of the substituents on a P-1' phenethyl group and a P-2 benzyl group improved potencies in both cases around 3-fold over the unsubstituted parent. Combining improved P-1' and P-2 groups into a single molecule gave an inhibitor with a 4.5 nM IC50 against MMP-13 and which is 270-fold selective over MMP-1. (C) 2003 Elsevier Science Ltd. All rights reserved.