Processes for the preparation of 2-cyano-3-naphthalene-1-yl-3-phenyl-propionic acid alkyl or benzyl esters
申请人:Liu Weiguo
公开号:US20050277783A1
公开(公告)日:2005-12-15
The present invention provides processes for the preparation of compounds of Formula I, which are useful in the preparation of pharmaceuticals for the treatment of inflammatory diseases. The compounds of Formula I are also useful as pharmaceuticals.
two rings in one step. The reaction features operational simplicity, broad substrate scope (>70 examples), good functional group compatibility, and the suitability to derivation of some bioactive molecules. Various control and kinetic isotope effect experiments were performed to understand the reaction mechanism. DFT investigations support an interesting imine α-carbon radical addition/1,5-hydrogen atom
一步实现顺序和可控的 C-H 功能化可以最大限度地利用 C-H 键,快速创建有价值的支架,并显着提高原子和官能团的利用率。在这项工作中,我们描述了一种铁催化的中继 C-H 功能化方案,该方案能够从头合成各种吡啶和吡啶酮。这种转化涉及三重 C–H 功能化(两个 C sp 3 –H 和一个 C sp 2–H) 并允许一步同时生成三个化学键和两个环。该反应具有操作简单、底物范围广(>70个例子)、良好的官能团相容性以及适合衍生一些生物活性分子的特点。进行了各种控制和动力学同位素效应实验以了解反应机理。DFT 研究支持有趣的亚胺 α-碳自由基加成/1,5-氢原子转移/均裂芳香取代级联过程。
Diastereoselective Synthesis of Spiro[2.3]hexanes from Methylenecyclopropane and Cyanoalkenes Catalyzed by a Tin-Ate Complex
with cyanoaokenes substituted with ester groups catalyzed by a Sn and Mg ate complex. The diastereoselectivity was affected by the halogen of the catalyst and electron‐withdrawing groups on the cyanoalkene. The transformation of the spirohexane was carried out to afford a cyclopentanoid which has been prepared only by a transition metal catalyst.
One-Pot Synthesis of γ-Azidobutyronitriles and Their Intramolecular Cycloadditions
作者:Ekaterina M. Budynina、Konstantin L. Ivanov、Hamidulla B. Tukhtaev、Feruza O. Tukhtaeva、Stanislav I. Bezzubov、Mikhail Ya. Melnikov
DOI:10.1055/s-0040-1706402
日期:2020.11
was demonstrated by their transformation into tetrazoles via intramolecular (3+2)-cycloaddition. A condition-dependent activation effect of the α-substituent was revealed in that case. Thermally activated azide–nitrile interaction did not differentiate the presence of an α-electron-withdrawing substituent in γ-azidonitriles, whereas the Lewisacidmediated (SnCl4 or TiCl4) reaction proceeded much easier