Photoinduced
<scp>NaI‐Promoted</scp>
Radical Borylation of Alkyl Halides and Pseudohalides
作者:Chenglan Wang、Lu Zhou、Kai Yang、Feng Zhang、Qiuling Song
DOI:10.1002/cjoc.202100115
日期:2021.7
A method for photoinduced NaI-promoted radical borylation of aliphatic halides and pseudohalides with bis(catecholato)diboron (B2cat2) as the boron source is introduced. The borylation reaction is operationally simple and shows high functional group tolerance and broad substrate scope. Preliminary mechanistic studies suggest that the reaction proceeds through SN2-based radical-generation strategy.
介绍了一种以双(儿茶酚)二硼(B 2 cat 2 )为硼源的光诱导NaI促进的脂肪族卤化物和拟卤化物自由基硼化的方法。硼酸化反应操作简单,显示出高官能团耐受性和广泛的底物范围。初步机理研究表明,该反应通过基于S N 2 的自由基生成策略进行。
Enabling the Use of Alkyl Thianthrenium Salts in Cross‐Coupling Reactions by Copper Catalysis
作者:Cheng Chen、Minyan Wang、Hongjian Lu、Binlin Zhao、Zhuangzhi Shi
DOI:10.1002/anie.202109723
日期:2021.9.27
used groups in organic synthesis. Here, a a series of thianthreniumsalts have been synthesized that act as reliable alkylation reagents and readily engage in copper-catalyzed Sonogashira reactions to build C(sp3)−C(sp) bonds under mild photochemical conditions. Diverse alkyl thianthreniumsalts, including methyl and disubstituted thianthreniumsalts, are employed with great functional breadth, since
A New Class of Amphiphiles Bearing Rigid Hydrophobic Groups for Solubilization and Stabilization of Membrane Proteins
作者:Pil Seok Chae、Søren G. F. Rasmussen、Rohini R. Rana、Kamil Gotfryd、Andrew C. Kruse、Aashish Manglik、Kyung Ho Cho、Shailika Nurva、Ulrik Gether、Lan Guan、Claus J. Loland、Bernadette Byrne、Brian K. Kobilka、Samuel H. Gellman
DOI:10.1002/chem.201200069
日期:2012.7.27
Non‐traditional amphiphiles: Conferring aqueous solubility on membraneproteins generally requires the use of a detergent or other amphiphilic agent. A new class of amphiphiles was synthesized, based on steroidal lipophilic groups, and evaluated with several membraneproteins. The results show that the new amphiphile, “glyco‐diosgenin” (GDN; see figure), confers enhanced stability to a variety of membrane proteins
Bringing membrane proteins into aqueous solution generally requires the use of detergents or other amphiphilic agents. The invention provides a new class of amphiphiles, each of which includes a multi-fused ring system as a lipophilic group. These new amphiphiles confer enhanced stability to a range of membrane proteins in solution relative to conventional detergents, leading to improved structural and functional stability of membrane proteins, including integral membrane proteins. Accordingly, the invention provides new amphiphiles for biochemical manipulations and characterization of membrane proteins. These amphiphiles display favorable behavior with membrane proteins and can be used to aid the solubilization, isolation, purification, stabilization, crystallization, and/or structural determination of membrane proteins.
Copper-catalysed, diboron-mediated <i>cis</i>-dideuterated semihydrogenation of alkynes with heavy water
作者:Xiaowei Han、Jiefeng Hu、Cheng Chen、Yu Yuan、Zhuangzhi Shi
DOI:10.1039/c9cc03213d
日期:——
efficiently mediate the transfer of two D atoms from heavy water directly onto alkynes through copper-catalysed cis-selective semihydrogenation. Avoiding the use of costly and flammable D2 gas, this safe and practical process can proceed with excellent chemoselectivity and stereoselectivity. Utilizing the present method as the key step, the formal asymmetrictotalsynthesis of d2-deuterium-labeled cis-combretastatin