Allene Functionalized Azobenzene Linker Enables Rapid and Light-Responsive Peptide Macrocyclization
作者:Mohammad R. Jafari、Jenner Lakusta、Rylan J. Lundgren、Ratmir Derda
DOI:10.1021/acs.bioconjchem.6b00026
日期:2016.3.16
functionalized water-soluble azobenzene reagent (BSBDA) and its application as a new tool for the rapid generation of visible light-responsive macrocyclic peptides and peptide libraries displayed on the surface of bacteriophage. The allenamide functionality promotes cysteine ligation in model peptides and those displayed on phage with rates 2–3 orders of magnitude faster than the established alkyl halide
Manganese(iii)-mediated radical cyclisations for the (Z)-selective synthesis of exo-alkylidene pyrrolidinones and pyrrolidines
作者:Harriet A. Keane、Wilfried Hess、Jonathan W. Burton
DOI:10.1039/c2cc32382f
日期:——
The cyclisation of alkynyl amido- and amino-malonates in the presence of manganese(III) acetate gives exo-alkylidene pyrrolidinones and pyrrolidines with a preference for the (Z)-alkene product isomer.
Synthesis, Antifungal Activity, and SAR Study of Some New 6-Perfluoropropanyl Quinoline Derivatives
作者:Yue-Ming Fang、Rui-Rui Zhang、Zhong-Hua Shen、Hong-Ke Wu、Cheng-Xia Tan、Jian-Quan Weng、Tian-Ming Xu、Xing-Hai Liu
DOI:10.1002/jhet.3031
日期:2018.1
A series of novel quinoline derivatives containing perfluoropropanyl moiety were designed and synthesized. The bioassay results showed that some of them exhibited good control efficacy against Pyricularia oryae. The fungicidal activity was affected by the substituted position in the molecule. It was found that the compound 3n possessed highest control effect against P. oryae at different concentration
Computation and Experiment Reveal That the Ring-Rearrangement Metathesis of Himbert Cycloadducts Can Be Subject to Kinetic or Thermodynamic Control
作者:Jonathan K. Lam、Hung V. Pham、K. N. Houk、Christopher D. Vanderwal
DOI:10.1021/ja409618p
日期:2013.11.20
Computational investigations demonstrated substrate-dependent changes in reaction pathways (ring-opening metathesis/ring-closing metathesis [ROM/RCM] cascade vs ring-closing metathesis/ring-opening metathesis [RCM/ROM] cascade). Furthermore, some reactions were judged to be under thermodynamic control and others under kinetic control. The greater understanding of the most likely reaction pathways and
在形成稠合多环内酰胺的 Himbert 芳烃/丙二烯环加合物的环重排复分解中的异常观察导致了更深入的实验研究,该研究产生了相互矛盾的结果。基于实验结果,相关系统内反应性的差异以及其他类似底物之间非对映选择性的意外变化并不容易解释。计算研究表明反应途径中的底物依赖性变化(开环复分解/闭环复分解 [ROM/RCM] 级联 vs 闭环复分解/开环复分解 [RCM/ROM] 级联)。此外,一些反应被判断为受热力学控制,而另一些反应受动力学控制。
Computational and Experimental Investigations of the Formal Dyotropic Rearrangements of Himbert Arene/Allene Cycloadducts
作者:Hung V. Pham、Alexander S. Karns、Christopher D. Vanderwal、K. N. Houk
DOI:10.1021/jacs.5b03718
日期:2015.6.3
with sufficient strain energy to drive rearrangement processes of the newly formed ring system. We disclose a detailed examination of a thermally induced stepwise dyotropic skeletal rearrangement of these cycloadducts, a reaction also first described by Himbert. We offer computational evidence for a two-stage mechanism for this formaldyotropicrearrangement and provide rationalizations for the significant