Palladium-Catalyzed Carbonylative Annulation Reactions Using Aryl Formate as a CO Source: Synthesis of 2-Substituted Indene-1,3(2<i>H</i>)-dione Derivatives
作者:Ying Zhang、Jing-Lei Chen、Zhen-Bang Chen、Yong-Ming Zhu、Shun-Jun Ji
DOI:10.1021/acs.joc.5b01758
日期:2015.11.6
An efficient synthesis of 2-substituted indene-1,3(2H)-diones from stable and readily available 1-(2-halophenyl)-1,3-diones by employing phenyl formate as a CO source has been developed. The reaction occurred via palladium-catalyzed intramolecular carbonylative annulation using K3PO4 as a base and DMSO as a solvent at 95 °C. In this protocol, the reaction showed a broad substrate scope with good to
已经开发了通过使用甲酸苯酯作为CO源从稳定且容易获得的1-(2-卤代苯基)-1,3-二酮有效合成2-取代的茚-1,3(2 H)-二酮的方法。该反应通过在95°C下使用K 3 PO 4为碱和DMSO作为溶剂的钯催化的分子内羰基环化反应进行。在该方案中,反应显示出广泛的底物范围,具有良好或优异的产率。
Super acid catalysed sequential hydrolysis/cycloisomerization of o-(acetylenic)benzamides under microwave condition: Synthesis, antinociceptive and antiinflammatory activity of substituted isocoumarins
作者:CHANDRASEKARAN PRAVEEN、P DHEENKUMAR、P T PERUMAL
DOI:10.1007/s12039-012-0325-2
日期:2013.1
Synthesis of isocoumarins and related compounds via triflic acid promoted hydrolysis/cyclization sequence of 2-(alkynyl)benzamides under microwave condition was achieved. The substrate scope of the reaction was broad to include not only aromatic but also polyaromatic and heteroaromatic motifs, thus highlighting the significance of this methodology. One-pot operation, short reaction time, good chemical
Palladium-Catalyzed Intramolecular Asymmetric C–H Functionalization/Cyclization Reaction of Metallocenes: An Efficient Approach toward the Synthesis of Planar Chiral Metallocene Compounds
synthesis of planar chiral metallocene compounds is reported. The reaction stereoselectively functionalized one of the ortho C-H bonds of Cp rings by intramolecular cyclization to form indenone derivatives in high yields with excellent enantioselectivity. The mild set of reaction conditions allowed a wide variety of chiral metallocene compounds to be synthesized with broad functional group tolerance. The
Tunable Synthesis of 3-Hydroxylisoquinolin-1,4-dione and Isoquinolin-1-one Enabled by Copper-Catalyzed Radical 6-<i>endo</i> Aza-cyclization of 2-Alkynylbenzamide
In this work, switchable synthesis of isoquinolin-1-one and 3-hydroxylisoquinolin-1,4-dione from 2-alkynylbenzamide is reported. The transformation works well with good yields and a broad reaction scope. The synthetic switch for providing isoquinolin-1-one and 3-hydroxylisoquinolin-1,4-dione is enabled by the use of a N2 or O2 atmosphere. Mechanism studies show that the reaction proceeds in a regioselective
A copper mediated sulfur–nitrogen coupling reaction for the synthesis of benzo[d]isothiazol-3(2H)-ones and related sulfur–nitrogen heterocycles has been presented, which requires 2-halo-arylamides, sulfur powder, 25–50 mol % of copper iodide/1,10-phenanthroline, and potassium carbonate as base.
提出了铜介导的硫-氮偶联反应,用于合成苯并[ d ]异噻唑-3(2 H)-酮和相关的硫-氮杂环,该反应需要2-卤代芳基酰胺,硫粉,25-50摩尔%的碘化铜/ 1,10-菲咯啉和碳酸钾作为碱。