972-11-2

Nickel-catalyzed decarbonylative stannylation of acyl fluorides under ligand-free conditions was disclosed. A variety of aromatic acyl fluorides are capable of reacting with silylstannanes in the presence of cesium fluoride. A one-pot decarbonylative stannylation/Migita-Kosugi-Stille reaction of benzoyl fluoride, giving rise to the direct formation of the corresponding cross-coupled products, further demonstrated the synthetic utility of the present method. This newly developed methodology with a good functional-group compatibility via C-F bond cleavage and C-Sn bond formation under nickel catalysis opens a new area for the functionalization of acyl fluorides in terms of carbon-heteroatom bond formation.

An unprecedented conversion of methyl esters to stannanes was realized, providing access to a series of arylstannanes via nickel catalysis. Various common esters including ethyl, cyclohexyl, benzyl, and phenyl esters can undergo the newly developed decarbonylative stannylation reaction. The reaction shows broad substrate scope, can differentiate between different types of esters, and if applied in consecutive fashion, allows the transformation of methyl esters into aryl fluorides or biaryls via fluororination or arylation.

PROBLEM TO BE SOLVED: To provide: a compound and a light emitter compound that are capable of providing an efficient, long-life light emitter emitting light in a wide wavelength region of the near-infrared region by being included in a light-emitting layer included in a light emitter; an efficient, long-life light emitter emitting light in a wide wavelength region of the near-infrared region; and a light-emitting device, a light source, an authentication device and an electronic apparatus that comprise the light emitter. SOLUTION: A light emitter 1 comprises a positive electrode 3, a negative electrode 8, and a light-emitting layer 5 disposed between the positive electrode 3 and the negative electrode 8 to emit light upon energization between the positive electrode 3 and the negative electrode 8. The light-emitting layer 5 contains a compound represented by a general formula IRD as a light-emitting material. SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2018,JPOandINPIT

A light emitting element included in the light emitting layer can be provided [in], in a wide wavelength range in the near infrared region of the light emitting element and a light-emitting element can emit light with high efficiency and long life for the compound a compound, in a wide wavelength range in the near infrared region with high efficiency and long life light emitting element emits light, the light emitting element provided in the light emitting device, light source, authentication device and electronic equipment. The present invention light-emitting element 1 is [a], the anode 3, cathode 8 and, anode and cathode 8 is provided between the 3, 3 between the anode 8 and cathode energized by a light-emitting layer 5, the light emitting layer 5, a compound represented by the general formula IRD is constituted as a luminescent material. Figure 1 [drawing] (by machine translation)

Gold(i)-catalyzed cross-coupling reactions of aryldiazonium salts with organostannanes are described. This redox neutral strategy offers an efficient approach to diverse biaryls, vinyl arenes and arylacetylenes. Monitoring the reaction with NMR and ESI-MS provided strong evidence for the in situ formation of Ph3PAuIR (R = aryl, vinyl and alkynyl) species which is crucial for the activation of aryldiazonium salts.

A novel Pd-catalyzed desulfitative cross-coupling reaction of sodium arylsulfinates with hexaalkyl distannanes is realized, allowing the facile synthesis of functionalized arylstannanes with moderate to excellent yields. The successful implement of gram-scale synthesis and tandem Stille coupling reaction demonstrates the potential applications of this method in organic synthesis.

A Ni-catalyzed stannylation of aryl esters with air- and moisture-insensitive silylstannyl reagents via Csp2 ?O cleavage is described. This protocol is characterized by its wide scope, including challenging combinations, thus enabling access to versatile building blocks and orthogonal C?heteroatom bond formations.

Stannylation of carbon-halogen bonds is one of the most promising and straightforward approaches for the preparation of organostannane compounds. Although a wide variety of methods are now available, all protocols require the use of highly nucleophilic organometals or wasteful stannyl sources like distannanes. Here, we report a new nickel-catalysed stannylation of aryl and alkenyl-halides using Bu3SnOMe as a stannyl source to afford aryl and vinyl-stannanes, respectively. This method enables the stannylation of not only bromides, but also chlorides and triflates to furnish functionalized aryl- and alkenyl-stannanes without the release of wasteful and toxic stannyl byproducts.

Transfer of aryl group from boron to tin can be achieved by simple treatment of arylboronic acids with tributyltin methoxide at 100 °C for 1 h under neat conditions. The resulting aryltributylstannanes are applicable to one-pot synthesis of diaryl ketones. Thus, Pd-catalyzed cross-coupling reaction with aroyl chlorides is allowed to proceed without isolation step to produce the corresponding diaryl ketones in good to high yields.

In an embodiment of the disclosure, a bithiophene derivative is provided. The bithiophene derivative has formula (I): In formula (I), R is C8-25 alkyl, and A includes In another embodiment of the disclosure, a semiconductor device including the bithiophene derivative is further provided.

In an embodiment of the disclosure, a bithiophene derivative is provided. The bithiophene derivative has formula (I): In formula (I), R is C8-25 alkyl, and A includes In another embodiment of the disclosure, a semiconductor device including the bithiophene derivative is further provided.

Gold-tinted: A gold catalyzed cyclization reaction of 1,6-diyne-4-en-3-ols, incorporating an in situ stannyl transfer reaction involving 2-tributylstannylfuran, gives synthetically valuable 2-stannylnaphthalenes (see scheme; DCE=dichloroethane). A gem-diaurated furan complex, was isolated and fully characterized by X-ray crystallographic analysis, and provides strong evidence for a tin to gold transmetalation step. Copyright

Compounds of the type trimethyl(napth-1-yl) stannate and tri(n-butyl)(napth-1-yl)stannate with differing substituents in the 2- or 4-position of the naphtyl ligands have been synthesized as precursors to the formation of substituted naphtylplatinum compou