A Cu-catalyzed coupling reaction of indanone oximeacetates with thiols has been developed for the synthesis of 2,3-functionalized 1-indenones. This protocol has several features including easy mild reaction conditions, stabilized enamine products, good tolerance of functional groups, and no external oxidants. This reaction enables direct derivatization on the indanone ring to provide valuable functionalized
茚满酮肟乙酸酯与硫醇的 Cu 催化偶联反应已被开发用于合成 2,3-功能化 1-茚酮。该协议有几个特点,包括容易温和的反应条件、稳定的烯胺产品、良好的官能团耐受性和无外部氧化剂。该反应能够在茚满酮环上直接衍生化,从而在室温下提供有价值的官能化茚酮。
Rapid Construction of Complex 2-Pyrrolines through Lewis Acid-Catalyzed, Sequential Three-Component Reactions via <i>in Situ</i>-Generated 1-Azaallyl Cations
作者:Marcel Schlegel、Christoph Schneider
DOI:10.1021/acs.orglett.8b01205
日期:2018.5.18
The first Sc(OTf)3-catalyzed dehydration of 2-hydroxy oxime ethers to generate benzylic stabilized 1-azaallyl cations, which are captured by 1,3-carbonyls, is described. A subsequent addition of primary amines in a sequential three-component reaction affords highly substituted and densely functionalized tetrahydroindeno[2,1-b]pyrroles as single diastereomers with up to quantitative yield. Thus, three
描述了2-羟基肟醚的第一Sc(OTf)3催化脱水以生成苄基稳定的1-氮杂烯丙基阳离子,其被1,3-羰基捕获。随后在顺序的三组分反应中添加伯胺可提供高取代度和高密度官能化的四氢茚并[2,1- b ]吡咯作为单一非对映异构体,并具有最高的定量收率。因此,在一锅操作中生成了三个新的σ键和两个相邻的四元立体生成中心。
Synthesis of 2-(Cyanomethyl)benzoic Esters via Carbon–Carbon Bond Cleavage of Indanones
A novel synthesis of 2-(cyanomethyl)benzoic esters from indanone derivatives has been established. This reaction proceeds via a deprotonation of alcohols with a chemical base, followed by a nucleophilic addition to indanones and Beckmann fragmentation. In addition, this reaction could also work under electrochemical conditions, and no external chemical bases were needed. This mild method offers a novel
Synthesis and Biological Evaluation of 9-Oxo-9<i>H</i>-indeno[1,2-<i>b</i>]pyrazine-2,3-dicarbonitrile Analogues as Potential Inhibitors of Deubiquitinating Enzymes
(1) as an active inhibitor of ubiquitin‐specific proteases (USPs), a family of hydrolytic enzymes involved in the removal of ubiquitin from protein substrates. The chemical behavior of compound 1 was examined. Moreover, the synthesis and in vitro evaluation of new compounds, analogues of 1, led to the identification of potent and selective inhibitors of the deubiquitinatingenzyme USP8.
高通量筛选突出-9-氧代9 ħ -茚并[1,2 b ]吡嗪-2,3-二腈(1)作为泛素特异性蛋白酶的活性抑制剂(USPS),一个家庭参与水解酶的从蛋白质底物中去除泛素。检查了化合物1的化学行为。此外,新化合物(1的类似物)的合成和体外评估还导致了去泛素化酶USP8的有效和选择性抑制剂的鉴定。
Catalytic Asymmetric Mannich/Cyclization of 2-Isothiocyanato-1-indanones: An Approach to the Synthesis of Bispirocyclic Indanone–Thioimidazolidine–Oxindoles
作者:Bo-Liang Zhao、Da-Ming Du
DOI:10.1021/acs.orglett.8b01389
日期:2018.7.6
building blocks in heteroannulation reactions with isatinimines. This convenient Mannich/cyclizationcascadereaction serves as a powerful tool for the enantioselectiveconstruction of bispirocyclic indanone–thioimidazolidine–oxindoles bearing two adjacent spiro-quaternary stereocenters in good to excellent yields with excellent diastereo- and enantioselectivities. Versatile transformations of the products