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A mild, efficient, and low-temperature palladium-catalyzed cyanation of (hetero)aryl halides and triflates is reported. Previous palladium-catalyzed cyanations of (hetero)aryl halides have required higher temperatures to achieve good catalytic activity. This current reaction allows the cyanation of a general scope of (hetero)aryl halides and triflates at 2-5 mol % catalyst loadings with temperatures ranging from rt to 40 C. This mild method was applied to the synthesis of lersivirine, a reverse transcriptase inhibitor.

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Reference：
Benzofuran – Wikipedia,
Benzofuran | C8H3224O – PubChem

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The present invention provides a, novel compound capable of improving luminous efficiency and lifetime of a device, and an organic electronic element using the same, and an electronic device. using the same. (by machine translation)

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Benzofuran – Wikipedia,
Benzofuran | C8H3213O – PubChem

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A number of nitrogen, sulfur or oxygen containing bis-heteroaromatic or bis-heterocyclic derivatives have been synthesized in good to excellent yields by homocoupling of the corresponding halogenated compounds in the presence of liganded (triphenylphosphine or 2,2′-bipyridine) nickel Complex Reducing Agents in THF or DME at 63 deg C.

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Benzofuran – Wikipedia,
Benzofuran | C8H3228O – PubChem

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A palladium catalyst based on a bidentate phosphine-type zwitterionic surfactant as a ligand exhibited an excellent catalytic activity in the Suzuki-Miyaura cross coupling reactions. This novel method allowed the reaction of aryl halides with arylboronic acids to occur in pure water at room temperature, forming a variety of biaryls in good to high yields. Heterobiaryls were also efficiently assembled even in the presence of water-insoluble heteroaryl halides as substrates. In addition, such a coupling protocol was successfully used in the iterative diarylation of 2,5-dibromopyridine in one-pot.

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Benzofuran – Wikipedia,
Benzofuran | C8H3256O – PubChem

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2-Cyanobenzofurans and 2-cyanobenzothiophenes were prepared through an efficient one-pot Ullmann-reaction/cyanation reaction. In the presence of CuI/Na2CO3-Pd(OAc)2/PPh3 in DMF, the reaction of 2-(gem-dibromovinyl)phenols and 2-(gem-dibromovinyl)thiophenols with K4Fe(CN)6, as non-toxic and user-friendly cyanating reagent, proceeded smoothly to generate the corresponding 2-cyanobenzofurans and 2-cyanobenzothiophenes in good yields.

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Benzofuran – Wikipedia,
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Mo(CO)6 acts as a source of carbon monoxide for the palladium-catalysed, microwave-assisted, carbonylative coupling of aryl or heteroaryl halides with sulfamide nucleophiles to yield aryl and heteroaryl acyl sulfamides.

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Benzofuran – Wikipedia,
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Benzofuran – Wikipedia,
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This review provides a summary of syntheses of galanthamine since 2006, the time of publication of the last major review on this topic. Some landmark syntheses that were reported prior to 2006 are mentioned here as well for completeness. A brief review of biosynthesis of galanthamine is also provided.

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Benzofuran – Wikipedia,
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The pair NaBH4-TMEDA as hydride source and a palladium catalyst in THF prove to be an efficient system for the hydrodehalogenation of halogenated heterocycles with one or more heteroatoms. In general, Pd(OAc) 2-PPh3 rapidly hydrodehalogenates reactive halo-heterocycles such as bromo-pyridines, -quinolines, -thiophenes, -indoles, -imidazoles, etc., at room temperature in very good yields, whereas in most cases PdCl2(dppf) reduces less reactive halides such as chloro-pyridines, -quinolines, -pyrimidines and bromo-indoles, -benzofurans, etc. Moreover, PdCl2(tbpf) shows to be even more active removing the 2- and 5-chlorine from both thiophene and thiazole rings. The reaction conditions tolerate various functional groups, allowing highly chemoselective reactions in the presence of halide, ester, alkyne, alkene and nitrile substituents. Moreover, with a proper selection of the catalyst it is also possible to obtain a good control in the regioselective hydrodehalogenation of a variety of polyhalogenated substrates.

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Benzofuran – Wikipedia,
Benzofuran | C8H3220O – PubChem

Chemistry is traditionally divided into organic and inorganic chemistry. Computed Properties of C8H5BrO, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 54008-77-4

Considering that the strong sigma-donor property of ylidenes derived from pi-extended imidazolium salts is conducive to increasing the catalytic activity of the resulting palladium N-heterocyclic carbene complexes, robust acenaphthoimidazol-ylidene palladium complexes 3a-c with varying bulky substituted groups were prepared from the corresponding acenaphthoimidazolium chlorides by heating with PdCl2 and K2CO3 in neat 3-chloropyridine in satisfactory yields. Even at a catalyst loading as low as 0.25 mol %, complex 3a exhibited extremely high catalytic activity toward Negishi cross-coupling of alkylzinc reagents with a wide range of (hetero)aryl halides under mild reaction conditions within 30 min. Besides a great number of bromoarenes, various less expensive and inactive (hetero)aryl chlorides were coupled successfully with the alkyl- and arylzinc reagents, in which active functional groups (such as -NH2) were well tolerated even in one-pot dicoupling transformations without protection. In addition, in the case of coupling with secondary alkylzinc reagents, undesired beta-hydride elimination leading to isomerized linear products was efficaciously suppressed. The catalyst system also displayed superiority in the construction of heterobiaryls through the coupling of heteroarylzinc reagents and heterocylic chloroarenes which were hardly accessible from the corresponding organoboron reagents by Suzuki-coupling reactions. Therefore, the protocol described in this paper represents a mild, general, and scalable approach to access various structurally intriguing and functionalized (hetero)aryls.

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Reference：
Benzofuran – Wikipedia,
Benzofuran | C8H3246O – PubChem