Synthesis and Evaluation of Substrate Analogues as Mechanism-Based Inhibitors of Type II Isopentenyl Diphosphate Isomerase
作者:Joel R. Walker、Steven C. Rothman、C. Dale Poulter
DOI:10.1021/jo702061d
日期:2008.1.1
dimethylallyl diphosphate, contains a tightly bound molecule of FMN. To probe the mechanism of the reaction, cyclopropyl and epoxy substrate analogues, designed to be mechanism-based irreversible inhibitors, were synthesized and evaluated with IDI-2 from Thermus thermophilus. The cyclopropyl analogues were alternative substrates. The epoxy analogue was an irreversible inhibitor, with kI = 0.37 ± 0.07 min-1
催化异戊烯基二磷酸酯和二甲基烯丙基二磷酸酯相互转化的2型异戊烯基二磷酸异构酶(IDI-2)包含FMN的紧密结合分子。为了探测反应的机理,合成了被设计为基于机理的不可逆抑制剂的环丙基和环氧底物类似物,并用嗜热栖热菌(Thermus thermophilus)的IDI-2进行了评估。环丙基类似物是替代底物。环氧类似物是不可逆的抑制剂,k I = 0.37±0.07 min -1,K I = 1.4±0.3μM。LC-MS研究表明形成了环氧化物-FMN加合物。
Syntheses of Seven-Membered Rings: Ruthenium-Catalyzed Intramolecular [5+2] Cycloadditions
作者:Barry M. Trost、Hong C. Shen、Daniel B. Horne、F. Dean Toste、Bernhard G. Steinmetz、Christopher Koradin
DOI:10.1002/chem.200401065
日期:2005.4.8
The Ru-catalyzed intramolecular [5+2] cycloaddition of cyclopropylenynes is investigated with respect to the regio- and diastereoselectivity as well as the functional group compatibility of the reaction. Evidence for the mechanism as occurring through a ruthenacyclopentene intermediate is elucidated from 1) the study of the diastereoselectivity of the cycloaddition; 2) the effect of variation of substituents
Through the combined use of computational (density functional theory) and experimental studies, a new [Rh(CO)2Cl]2 catalyzed two-component [5+2+1] cycloaddition of ene-vinylcyclopropanes and CO for the synthesis of fused bicyclic cyclooctenones has been designed and experimentally realized. The key point behind this design is to turn a disfavored reductive elimination of (sp3)C−Rh−C(sp3) to an easier
通过计算(密度泛函理论)和实验研究的结合,一种新的 [Rh(CO)2Cl]2 催化烯-乙烯基环丙烷和 CO 的双组分 [5+2+1] 环加成反应合成稠合双环环辛酮已经设计并实验实现。这种设计背后的关键点是通过引入 CO 将 (sp3)C-Rh-C(sp3) 的不利还原消除转变为更容易迁移的 (sp3)C-Rh-CO-C(sp3) 还原消除这些反应对于具有各种系链类型和取代基的底物以良好的产率进行,为双环环辛烯酮的构建提供了灵活、方便、高效和立体控制的方法。
Synthesis of Polycyclic <i>n</i>/5/8 and <i>n</i>/5/5/5 Skeletons Using Rhodium-Catalyzed [5 + 2 + 1] Cycloaddition of Exocyclic-ene-vinylcyclopropanes and Carbon Monoxide
作者:Lu-Ning Wang、Zhiqiang Huang、Zhi-Xiang Yu
DOI:10.1021/acs.orglett.3c00402
日期:2023.3.17
A rhodium-catalyzed [5 + 2 + 1] reaction of exocyclic-ene-vinylcyclopropanes (exo-ene-VCPs) and CO has been realized to access challenging tricyclic n/5/8 skeletons (n = 5, 6, 7), some of which are found in natural products. This reaction can be used to build tetracyclic n/5/5/5 skeletons (n = 5, 6), which are also found in natural products. In addition, 0.2 atm CO can be replaced by (CH2O)n as the
已实现外环烯-乙烯基环丙烷(外烯-VCP)和 CO 的铑催化 [5 + 2 + 1] 反应,以获得具有挑战性的三环 n /5/8 骨架(n = 5, 6 , 7 ),其中一些存在于天然产品中。该反应可用于构建四环n /5/5/5 骨架 ( n = 5, 6),这些骨架也存在于天然产物中。此外,0.2 atm CO 可以被 (CH 2 O) n替代作为 CO 替代物,以类似的效率实现 [5 + 2 + 1] 反应。
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