Environmentally Benign Synthesis of Indeno[1,2-b]quinolines via an Intramolecular Povarov Reaction
摘要:
A new synthetic route to indeno[1,2-b]quinolines via reactions of o-propargylbenzaldehydes with N-aryl amines based on an intramolecular aza-Diels-Alder (Povarov) reaction has been developed. This method offers several advantages such as no requirement for an oxidant, high efficiency, and a wide reaction scope.
Fused Catechol Ethers from Gold(I)-Catalyzed Intramolecular Reaction of Propargyl Ethers with Acetals
作者:Kamalkishore Pati、Gabriel dos Passos Gomes、Trevor Harris、Igor V. Alabugin
DOI:10.1021/acs.orglett.5b03522
日期:2016.3.4
Selective gold(I)-catalyzed rearrangement of aromatic methoxypropynyl acetals leads to fused catecholethers (1,2-dialkoxynapthalenes) in excellent yields. Furthermore, this process extends to the analogous heterocyclic and aliphatic substrates. Alkyne activation triggers nucleophilic addition of the acetal oxygen that leads to an equilibrating mixture of oxonium ions of similar stability. This mixture
[EN] HETEROCYCLIC SPIRO-COMPOUNDS AS AM2 RECEPTOR INHIBITORS<br/>[FR] COMPOSÉS SPIRO HÉTÉROCYCLIQUES CONSTITUANT DES INHIBITEURS DU RÉCEPTEUR DE L'AM2
申请人:UNIV SHEFFIELD
公开号:WO2020099885A1
公开(公告)日:2020-05-22
Disclosed are compounds of the formula (I) and pharmaceutically acceptable salts thereof: wherein R1, R2, R4, R5, R6, R7, R8, R9, R10,Z, X1, X2, X3, L2, HET, n and q are as defined herein. The compounds are inhibitors of adrenomedullin receptor subtype 2 (AM2). Also disclosed are the compounds for use in the treatment of diseases modulated AM2, including proliferative diseases such as cancer; pharmaceutical compositions comprising the compounds; methods for preparing the compounds; and intermediates useful in the preparation of the compounds.
Catalytic Synthesis of 1<i>H</i>-2-Benzoxocins: Cobalt(III)-Carbene Radical Approach to 8-Membered Heterocyclic Enol Ethers
作者:Minghui Zhou、Lukas A. Wolzak、Zirui Li、Felix J. de Zwart、Simon Mathew、Bas de Bruin
DOI:10.1021/jacs.1c10927
日期:2021.12.8
several opportunities for the synthesis of new bioactive compounds. The reactions are shown to proceed via cobalt(III)-carbene radical intermediates, which are involved in intramolecular hydrogen transfer (HAT) from the allylic position to the carbene radical, followed by a near-barrierless radical rebound step in the coordination sphere of cobalt. The proposed mechanism is supported by experimental observations
使用顺磁性钴(II)卟啉催化剂[Co II (TPP)](TPP=四苯基卟啉)对邻烯丙基羰基-芳基N-芳基磺酰腙进行金属自由基活化,为合成新型8元杂环化合物提供了一种有效且强大的方法烯醇醚。该合成方案通用且实用,能够以高产率合成多种独特的 1 H -2-苯并氧辛。催化环化反应具有优异的化学选择性,具有较高的官能团耐受性,并为合成新的生物活性化合物提供了多种机会。该反应通过钴(III)-卡宾自由基中间体进行,该中间体参与从烯丙基位置到卡宾自由基的分子内氢转移(HAT),然后在钴的配位层中进行近无障碍的自由基反弹步骤。所提出的机制得到了实验观察、密度泛函理论(DFT)计算和自旋捕获实验的支持。
Functionalization of Acetalic C(sp3)-H Bonds by Scandium(III) Triflate-Catalyzed Intramolecular Redox Reactions: Tandem 1,4-Hydride Transfer/1,5-Cyclization Processes Leading to Protected 1-Indanones
作者:Mateo Alajarin、Marta Marin-Luna、Angel Vidal
DOI:10.1002/adsc.201000812
日期:2011.3.7
A new CC bond forming reactionleading to adjacent quaternary carbons is reported. It is a one‐pot hydride shift/cyclization process facilitated by the hydricity of the acetalicCH bonds, with benzylidenemalonate fragments as electrophilic hydride acceptors, and the catalysis of scandium(III) triflate. The reaction products are 1,2‐dihydroindane derivatives. Alkoxy and alkanethiolate groups can be
Tandem processes promoted by a hydrogen shift in 6-arylfulvenes bearing acetalic units at <i>ortho</i> position: a combined experimental and computational study
thermally activated hydrogen shift. Structurally related fulvenes with non-cyclic acetalic units afforded mixtures of 4- and 9-alkoxybenz[f]indenes under similar thermal conditions. Mechanistic paths promoted by an initial [1,4]-, [1,5]-, [1,7]- or [1,9]-H shift are conceivable for explaining these conversions. Deuterium labelling experiments exclude the [1,4]-hydride shift as the first step. A computational