N-乙酰氧基乙酰苯胺的一般和有效的铑催化氧化还原中性环化,容易从硝基芳烃中获得,与炔烃已经完成,用于合成取代的吲哚衍生物。从各种取代的N-乙酰氧基乙酰苯胺和对称/不对称炔烃中获得了范围广泛的取代 2,3-二芳基吲哚,产率从良好到优异。所开发的方法成功地与N-乙酰氧基乙酰苯胺的合成相结合,用于从硝基芳烃中有效地一锅法合成吲哚。重要的特点是引入了N-乙酰氧基乙酰胺作为新的导向基团,氧化还原中性环化,无添加剂方法,广泛的官能团耐受性,分子内形式和硝基芳烃的一锅反应。该方法进一步扩展到合成有效的高级吲哚类似物,即。、吡咯并[3,2- f ]吲哚和二苯并[ a , c ]咔唑。此外,基于潜在芳基-Rh中间体的分离和化学计量研究,提出了一种合理的机制。
N-乙酰氧基乙酰苯胺的一般和有效的铑催化氧化还原中性环化,容易从硝基芳烃中获得,与炔烃已经完成,用于合成取代的吲哚衍生物。从各种取代的N-乙酰氧基乙酰苯胺和对称/不对称炔烃中获得了范围广泛的取代 2,3-二芳基吲哚,产率从良好到优异。所开发的方法成功地与N-乙酰氧基乙酰苯胺的合成相结合,用于从硝基芳烃中有效地一锅法合成吲哚。重要的特点是引入了N-乙酰氧基乙酰胺作为新的导向基团,氧化还原中性环化,无添加剂方法,广泛的官能团耐受性,分子内形式和硝基芳烃的一锅反应。该方法进一步扩展到合成有效的高级吲哚类似物,即。、吡咯并[3,2- f ]吲哚和二苯并[ a , c ]咔唑。此外,基于潜在芳基-Rh中间体的分离和化学计量研究,提出了一种合理的机制。
Catalytic [2+2+1] Cross-Cyclotrimerization of Silylacetylenes and Two Alkynyl Esters To Produce Substituted Silylfulvenes
作者:Yu Shibata、Ken Tanaka
DOI:10.1002/anie.201105517
日期:2011.11.11
Three become one: The cationic rhodium(I) complex [Rh(cod)2]BF4 catalyzes the [2+2+1] cross‐cyclotrimerization of silylacetylenes and twoalkynylesters, leading to substitutedsilylfulvenes (see scheme; cod=1,5‐cyclooctadiene). The reductive complexation of the silylfulvene product with RhCl3 in EtOH furnished the corresponding dinuclear electron‐deficient cyclopentadienyl rhodium(III) complex.
Mild and efficient synthesis of indoles and isoquinolones<i>via</i>a nickel-catalyzed Larock-type heteroannulation reaction
作者:Wei-Zhi Weng、Jian Xie、Bo Zhang
DOI:10.1039/c8ob00795k
日期:——
A simple and efficient approach for the preparation of substituted indoles and isoquinolones via a nickel-catalyzed Larock-type heteroannulation reaction is reported. This transformation employed air-stable and inexpensive Ni(dppp)Cl2 as a precatalyst and Et3N as a mild base. Moreover, the reaction occurs efficiently under mild conditions, and a wide range of substituted indoles and isoquinolones bearing
Mechanochemical indole synthesis by rhodium-catalysed oxidative coupling of acetanilides and alkynes under solventless conditions in a ball mill
作者:Gary N. Hermann、Celine L. Jung、Carsten Bolm
DOI:10.1039/c7gc00499k
日期:——
A mechanochemical indole synthesis by rhodium(III)-catalysed C–H bond functionalisation in a planetary mill has been developed. It occurs in the absence of any solvent, does not require additional heating and only needs catalytic quantities of Cu(OAc)2 in combination with dioxygen as terminal oxidant. Accordingly, the process represents a powerful and environmentally benign alternative to the common
Oxidative Annulation of Anilides with Internal Alkynes Using an (Electron‐Deficient η
<sup>5</sup>
‐Cyclopentadienyl)Rhodium(III) Catalyst Under Ambient Conditions
作者:Yuki Hoshino、Yu Shibata、Ken Tanaka
DOI:10.1002/adsc.201300884
日期:2014.5.5
A dinuclear (electron‐deficient η5‐cyclopentadienyl)rhodium(III) complex was synthesized on a preparative scale via the rhodium‐catalyzed cross [2+2+1] cyclotrimerization of silylacetylenes and twoalkynylesters, leading to substitutedsilylfulvenes, followed by reductive complexation with rhodium(III) chloride in ethanol. The thus obtained dinuclear (electron‐deficient η5‐cyclopentadienyl)rhodium(III)