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Relevant academic research and scientific papers

Divergent Synthesis of α-Aroyloxy Ketones and Indenones: A Controlled Domino Radical Reaction for Di- A nd Trifunctionalization of Alkynes

Three different modes of aldehyde/alkyne assembly through a controlled radical reaction are devised. While a double C-H activation/annulation leads to indenones, a concurrent oxidation of both aldehydes and alkynes in the course of their connection offers

Preparation method of polysubstituted indanone derivative

The invention relates to a polysubstituted indanone derivative and a preparation method thereof, and belongs to the technical field of organic synthesis. The preparation method comprises the followingsteps: in a solvent, reacting aryl aldehyde with an alkyne derivative under an illumination condition, and carrying out post-treatment to generate the polysubstituted indanone derivative. The methodhas the advantages of simple operation, environmental friendliness, high regioselectivity, low cost, mild reaction conditions, simple operation, wide substrate range, simple post-treatment, high yield, high purity and the like.

Synthesis of Indenones via Palladium-Catalyzed Ligand-Free Carbonylation

A palladium-catalyzed ligand-free carbonylation reaction has been developed for the synthesis of indenones. Under CO atmosphere, this cascade reaction proceeded smoothly to provide the desired indenones in moderate to excellent yields with good functional-group compatibility. The mechanistic investigations suggested the in situ formation of palladium nanoparticles and this transformation was driven by a controlled reaction sequence of alkyne insertion followed by carbonylation and annulation to form the indenone framework. (Figure presented.).

Synthetic method of indanone and derivatives thereof

The invention discloses a synthesis method of indanone and derivatives thereof, which comprises the following steps: adding a dialkyl acetylene compound, a palladium catalyst, an additive and an inorganic base into a dry reaction container together, and r

Ferrocene-Initiated Oxidative Cyclization of Benzaldehyde with Alkyne: New Strategy to Substituted Indenones

A ferrocene-initiated oxidative cyclization of benzaldehyde with alkyne was successfully developed as a novel strategy for direct access to substituted indenones in high yields. The commercially available and cheap ferrocene was employed as an initiator. This transformation could proceed smoothly with a low initiator loading (0.5 mol-%) and provide the titled products up to 90 % yield with atom-, step-economy and good substrates tolerance. The indenones obtained would be important building blocks in organic synthesis.

A polysubstituted indenone derivatives and its preparation method (by machine translation)

The present invention discloses a multi-substituted indenone derivatives and its preparation method, its structural formula is: Wherein R1 Is alkyl, halogen, methoxy, trifluoromethyl, N, N - dimethyl or methylthio, R2 is aryl. Synthesis of this invention has a plurality of substituted base yinyin alkone derivatives, from the point of view of pharmaceutical chemistry has far-reaching significance. The method of this invention easily obtained raw material, economic low-cost, high yield, mild reaction conditions, wide substrate range, easy post treatment. (by machine translation)

Cobalt(III)-catalyzed annulation of esters and alkynes: A facile route to indenones

An efficient protocol for the synthesis of indenones has been developed via the annulation of benzoic esters and internal alkynes by exploiting the cobalt catalyst.

Palladium-catalyzed annulation of alkynes with ortho -halide-containing benzyl alcohols in aqueous medium

The Pd-catalyzed annulations of ortho-halide-containing benzyl alcohols with alkynes for the synthesis of indenones were achieved in aqueous Triton X-100 micelles with good yields and wide substrate scopes. Moreover, the indenones obtained in this procedure can be further functionalized to form some more synthetic useful derivatives via an environmental-friendly way.

Access to indenones by rhodium(III)-catalyzed C-H annulation of arylnitrones with internal alkynes

Under redox-neutral conditions, rhodium(III)-catalyzed C-H annulation of N-tert-butyl-α-arylnitrones with internal alkynes has been realized for the synthesis of indenones under mild conditions. This reaction proceeded in moderate to high yields and with

Rhodium-catalyzed direct annulation of aldehydes with alkynes leading to indenones: Proceeding through in situ directing group formation and removal

The Rh-catalyzed direct annulation of an aldehyde with an alkyne leading to indenone was achieved. The in situ temporal installation of acetylhydrazine enables the annulation of the ortho arene C-H bond with alkynes to form ketone hydrazone. Subsequently, the in situ directing group removal takes place since ketone hydrazone is more susceptible toward hydrolysis than aldehyde hydrazone. Notably, this procedure tolerates a series of functional groups, such as methoxyl, acetylamino, fluoro, trifluoromethyl, methoxycarbonyl, chloro, and bromo groups.