86,522 research outputs found
2,5,7-Trisubstituted benzo[b]furans through a copper- and/or palladium-catalyzed assembly and functionalization process
No full textA straightforward approach to the synthesis of 2,5,7-trisubstituted benzo[b]furans from 2-bromo- and 2-
chloro-6-iodo-4-substituted phenols through a consecutive copper- and/or palladium-catalyzed assembly
and functionalization process is described. Functionalization at the C(7) position is carried out by
Suzuki–Miyaura cross-coupling and C–N bond forming reactions
2,5,7-Trisubstituted benzo[b]furans through a copper- and/or palladium-catalyzed assembly and functionalization process
No full textPalladium-Catalyzed Cascade Reactions of 1-(3-Arylprop-2-ynyloxy)-2-bromo Benzene Derivatives with Organoboron Compounds
No full textApplications of the cascade cyclocarbopalladation reaction followed by Suzuki-Miyaura coupling reactions of the readily available aryl-substituted propargylic aryl ethers with arylboronic acid and potassium trans-beta-styryltrifluoroborate accomplish a new versatile entry in the synthesis of benzofuran derivatives. Notably, a new approach to the challenging synthesis of C3 functionalized 2-unsubstituted benzofurans has been developed by a cyclocarbopalladation/cross-coupling/aromatization process
Gold versus Silver Catalyzed Intramolecular Hydroarylation Reactions of [(3-Arylprop-2-ynyl)oxy]benzene Derivatives
No full text"The scope and the generality of gold versus silver catalyzed intramolecular hydroarylation reactions of 3-[(3-arylprop-2-ynyl)oxy]benzene derivatives in terms of rings substitution was investigated. Only products deriving from 6-endo cyclization were exclusively formed. The features of substituents had a considerable effect on the reaction outcome in the presence of silver catalysis, whereas gold catalysis revealed unique blend of reactivity and selectivity and represented the only choice for the intramolecular hydroarylation reaction of the starting substrates bearing electron deficient arenes.
Palladium-Catalyzed Cascade Reactions of 1-(3-Arylprop-2-ynyloxy)-2-bromo Benzene Derivatives with Organoboron Compounds
No full text"Applications of the cascade cyclocarbopalladation. reaction followed by Suzuki.Miyaura coupling reactions. of the readily available aryl-substituted propargylic aryl ethers. with arylboronic acid and potassium trans-â-styryltrifluoroborate. accomplish a new versatile entry in the synthesis of. benzofuran derivatives. Notably, a new approach to the. challenging synthesis of C3 functionalized 2-unsubstituted. benzofurans has been developed by a cyclocarbopalladation\/. cross-coupling\/aromatization process.
Multisubstituted benzo[b]furans through a copper- and/or palladium-catalyzed assembly and functionalization process
No full text"Full details as well as the study of the scope, limitations, and further elaboration of a straightforward. approach to the synthesis of 2,5,7-trisubstituted benzo[b]furans from 2-bromo- and 2-chloro-6-iodo-4-. substituted phenols through a consecutive copper- and\/or palladium-catalyzed assembly and functionalization. process is described. Functionalization at the C(7) position is carried out by SuzukieMiyaura. cross-coupling, alkynylation, alkenylation, and CeN bond forming reactions. A one-pot protocol for the. synthesis of 2,5,7-trisubstituted benzo[b]furans is also reported..
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
[Newspaper Clipping: Author Claims Evidence of Second JFK Assassin #1]
No full textNewspaper article titled "Author Claims Evidence of Second JFK Assassin." The article states that author Richard J. Whalen concluded "that there is circumstantial evidence to support the theory of a second assassin in the shooting of President John F. Kennedy.
Enantio- and diastereoselective total synthesis of (+) 13-stemarene by simple third generation methods.
No full textAlso By The Same Author: AKTiveAuthor, a Citation Graph Approach to Name Disambiguation
No full textThe desire for definitive data and the semantic web drive for inference over heterogeneous data sources requires co-reference resolution to be performed on those data. In particular, name disambiguation is required to allow accurate publication lists, citation counts and impact measures to be determined. This paper describes a graph-based approach to author disambiguation on large-scale citation networks. Using self-citation, co-authorship and document source analyses, AKTiveAuthor clusters papers, achieving precision of 0.997 and recall of 0.818 over a test group of eight surname clusters
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