Chiral Brønsted Acid and Gold Catalyzed Enantioselective Synthesis of 1,8‐Dihydroindeno[2,1‐
<i>b</i>
]pyrroles
作者:Jianwen Jin、Yichao Zhao、Ella Min Ling Sze、Prasath Kothandaraman、Philip Wai Hong Chan
DOI:10.1002/adsc.201801178
日期:2018.12.21
1‐b]pyrroles that relies on the chiral Brønsted acid‐ and gold(I)‐catalyzed dehydrative Nazarov‐type electrocyclization (DNE)/hydroamination of electron‐rich β‐amino‐1,4‐enyols is described. Achieved in product yields up to 99% and enantiomeric excess (ee) values up to 99%, the asymmetric reaction provides access to a novel class of compounds containing both the privileged 1H‐indene and pyrrole scaffold
一种对映选择性的合成方法,该方法依赖于手性布朗斯台德酸和金(I)催化的脱水纳扎罗夫型电环化(DNE)/富电子加氢胺化反应制备1,8-二氢茚并[2,1- b ]吡咯描述了β-氨基-1,4-烯醇。不对称反应可实现高达99%的产品收率和高达99%的对映体过量(ee)值,可获取包含特权的1 H茚和吡咯骨架的新型化合物,这可能会导致新的药理应用。
Synthesis of 1,5-benzothiazepines with Microwave Irradiation under Solvent and Catalyst-free Conditions
作者:M. Rahman、A. Roy、A. Majee、A. Hajra
DOI:10.3184/030823409x416965
日期:2009.3
Microwave irradiation of α,β-p-unsaturated ketones (chalcones) and o-aminothiophenol in the absence of solvent and catalyst provides a highly efficient methodology for the synthesis of 1,5-benzothiazepines in moderate to good yields.
Design, synthesis, cytotoxicity screening and molecular docking of new 3-cyanopyridines as survivin inhibitors and apoptosis inducers
作者:Rehab Sabour、Marwa F. Harras、Ahmed B.M. Mehany
DOI:10.1016/j.bioorg.2019.103358
日期:2020.1
chemotherapeutic treatment and radiotherapy. Additionally, survivin is overexpressed selectively in most cancer types with a very little expression in completely differentiated cells, which encouraged us to design and synthesize a novel series of 3-cyanopyridine derivatives targeting survivin. The newly synthesized compounds were evaluated for their cytotoxic activities against three cancer cell lines; PC-3
target. The clinical success of selective inhibitors targeting oncogenic FLT3, however, has been limited due to the acquisition of drug resistance. Herein the identification of a dual FLT3/microtubule polymerization inhibitor, chalcone 4 (2′-allyloxy-4,4′-dimethoxychalcone), is reported through screening of 15 related chalcones for differential antiproliferative activity in leukemia cell lines dependent
Iron-Catalyzed Coupling of Alkenes and Enones: Sakurai–Michael-type Conjugate Addition of Catalytic Allyliron Nucleophiles
作者:Sarah G. Scrivener、Yidong Wang、Yi-Ming Wang
DOI:10.1021/acs.orglett.3c00139
日期:2023.3.10
The iron-catalyzed coupling of alkenes and enones through allylic C(sp3)–H functionalization is reported. This redox-neutral process employs a cyclopentadienyliron(II) dicarbonyl catalyst and simple alkene substrates to generate catalytic allyliron intermediates for 1,4-addition to chalcones and other conjugated enones. The use of 2,4,6-collidine as the base and a combination of triisopropylsilyl triflate
报道了通过烯丙基 C(sp 3 )–H 官能化的铁催化烯烃和烯酮的偶联。这种氧化还原中性过程采用环戊二烯基铁 (II) 二羰基催化剂和简单的烯烃底物来生成催化烯丙铁中间体,用于查耳酮和其他共轭烯酮的 1,4-加成。发现使用2,4,6-可力丁作为碱以及三异丙基甲硅烷基三氟甲磺酸酯和LiNTf 2的组合作为路易斯酸可以在温和的、官能团耐受的条件下促进这种转化。电子未活化的烯烃以及烯丙基苯衍生物都可以用作亲核偶联配偶体,一系列带有电子不同取代基的烯酮也可以用作亲核偶联配偶体。