Biochemical, Structural, and Biological Evaluation of Tranylcypromine Derivatives as Inhibitors of Histone Demethylases LSD1 and LSD2
作者:Claudia Binda、Sergio Valente、Mauro Romanenghi、Simona Pilotto、Roberto Cirilli、Aristotele Karytinos、Giuseppe Ciossani、Oronza A. Botrugno、Federico Forneris、Maria Tardugno、Dale E. Edmondson、Saverio Minucci、Andrea Mattevi、Antonello Mai
DOI:10.1021/ja101557k
日期:2010.5.19
demethylase inhibitors. This drug is a clinically validated antidepressant known to target monoamine oxidases A and B. These two flavoenzymes are structurally related to LSD1 and LSD2. Mechanistic and crystallographic studies of tranylcypromine inhibition reveal a lack of selectivity and differing covalent modifications of the FAD cofactor depending on the enantiomeric form. These findings are pharmacologically
LSD1 和 LSD2 组蛋白去甲基化酶涉及许多生理和病理过程,从肿瘤发生到疱疹病毒感染。这里介绍了一项全面的结构、生化和细胞研究,以探索这些酶在表观遗传疗法中的潜力。这种方法使用反苯环丙胺作为设计新型去甲基酶抑制剂的化学支架。这种药物是一种经过临床验证的抗抑郁药,已知靶向单胺氧化酶 A 和 B。这两种黄素酶在结构上与 LSD1 和 LSD2 相关。反苯环丙胺抑制的机理和晶体学研究表明,根据对映体形式,FAD 辅因子缺乏选择性和不同的共价修饰。这些发现在药理学上是相关的,因为反苯环丙胺目前作为外消旋混合物给药。合成了大量反苯环丙胺类似物并筛选了抑制活性。我们发现 LSD 和 MAO 酶的共同进化起源,尽管它们的功能和底物特异性无关,但反映在相关的配体结合特性上。鉴定了一些具有部分酶选择性的化合物。这些新抑制剂之一的生物活性是用选择的急性早幼粒细胞白血病细胞模型评估的,因为其发病机制包括几种
Substituent effects on the13C NMR spectra of ethylcis- andtrans-2-(p-substituted-phenyl)-1-cyclopanecarboxylates
作者:Yoshiaki Kusuyama、Kenjiro Tokami
DOI:10.1002/mrc.1260300415
日期:1992.4
13C NMR spectra were measured for a series of ethyl cis- and trans-2-(p-substituted - phenyl) - 1 - cyclopropanecarboxylates. The effects of the para substituents and the geometry on the chemical shifts are discussed.
addition of the very reactive metallacarbene intermediate in an early transition state to the substrate alkene is concerted but strongly asynchronous, with substantial cationic character on one alkene carbon in the neighborhood of the transition state. Evidence from isotope effects and Hammett studies supports the nature of the transition state. Formation of a metallacyclobutaneintermediate by a [2+2] addition
Cyclopropanation of Olefins with Diazo Compounds Catalyzed by a Dicopper-substituted Silicotungstate [γ-H<sub>2</sub>SiW<sub>10</sub>O<sub>36</sub>Cu<sub>2</sub>(μ-1,1-N<sub>3</sub>)<sub>2</sub>]<sup>4−</sup>
作者:Keigo Kamata、Toshihiro Kimura、Noritaka Mizuno
DOI:10.1246/cl.2010.702
日期:2010.7.5
silicotungstate (TBA) 4 -[γ-H 2 SiW 10 O 36 Cu II 2 (μ-1,1-N 3 ) 2 ] (I, TBA = tetra-n-butylammonium) could act as an efficient precatalyst for the chemoselective cylopropanation of olefins with diazo compounds. Various kinds of olefins were efficiently converted to the corresponding cyclopropane derivatives in good yields.
双铜取代的 γ-Keggin 硅钨酸盐 (TBA) 4 -[γ-H 2 SiW 10 O 36 Cu II 2 (μ-1,1-N 3 ) 2 ] (I, TBA = 四正丁基铵)作为烯烃与重氮化合物化学选择性环丙烷化的有效预催化剂。各种烯烃以良好的收率有效地转化为相应的环丙烷衍生物。
Multigram Synthesis and C−C/C−N Couplings of Functionalized 1,2‐Disubstituted Cyclopropyltrifluoroborates
作者:Oleksandr V. Hryschuk、Yevhen Yurov、Andriy V. Tymtsunik、Volodymyr O. Kovtunenko、Igor V. Komarov、Oleksandr O. Grygorenko
DOI:10.1002/adsc.201900879
日期:2019.12.3
A convenient approach to the multigram synthesis of functionalized 1,2‐disubstituted cyclopropyltrifluoroborates was developed, based on Pd(II)‐ or Cu(I)‐catalyzed reaction of vinyltrifluoroborate and diazo compounds. Optimized protocols allowed for the preparation of the target products as pure diastereomers on multigram scale. It was shown that the title compounds were good coupling partners for