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All total 85 Articles be found
All total 85 Articles be foundTransition-Metal-Free Diarylation of Isocyanates with Arynes
Jang, Woo Cheol,Hwang, Dong Wook,Seo, Jeong Hoon,Ko, Haye Min
supporting information, (2019/08/30)
A facile method for the transition-metal-free diarylation of isocyanates with arynes in the presence of cesium fluoride has been developed, which affords functionalized diaryl amines in moderate to excellent yields. This reaction has good functional group tolerance and provides excellent regioselectivity by utilizing a methoxy-substituted aryne precursor.
PHOSPHINE COMPOUND, CROSSLINKED COMPOSITION, AND MANUFACTURING METHOD OF AROMATIC AMINE COMPOUND
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Paragraph 0044-0046; 0047-0048, (2019/12/25)
PROBLEM TO BE SOLVED: To provide a phosphine compound capable of constituting a transition metal complex excellent in reaction speed and selectivity as a catalyst. SOLUTION: There is provided a phosphine compound represented by the formula (I). In the formula Ar represents each independently an aryl group which may be substituted, R1 represents each independently a linear, branched or cyclic alkyl group, R2 represents each independently a linear, branched or cyclic alkyl group, alkoxy group or aryl group which may be substituted, or neighboring 2 R2 are bound each other to form a ring, and n represents an integer of 0 to 4. SELECTED DRAWING: None COPYRIGHT: (C)2020,JPOandINPIT
DIARYL AMINE COMPOUND AND METHOD FOR PRODUCING THE SAME
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Paragraph 0218; 0235-0237, (2021/03/16)
The present invention relates to a process for the preparation of diaryl amine compounds. A compound represented by chemical formula 1, a compound represented by chemical formula 2, and a synthetic reagent in a solvent, the synthetic reagent being CsF, KF, 18 - crown -6, K. 2 CO3, [TBAT] The present invention relates to a process for the preparation of diaryl amine compounds comprising a material selected from the group consisting of a (tetrabutylammonium difluorotriphenylsilicate), TBAF (tetrabutylammonium fluoride) and combinations thereof. Chemical Formula 1. Chemical Formula 2. The diaryl amine compound can be synthesized under the absence of a transition metal to be used to synthesize diaryl amine compounds having various substituents.
Design of Benzimidazolyl Phosphines Bearing AlterableP,OorP,N-Coordination: Synthesis, Characterization, and Insights into Their Reactivity
Wong, Shun Man,Choy, Pui Ying,Zhao, Qingyang,Yuen, On Ying,Yeung, Chung Chiu,So, Chau Ming,Kwong, Fuk Yee
supporting information, p. 2265 - 2271 (2021/05/05)
A new series of hemilabile benzimidazolyl phosphines is reported. Entities in this ligand family can be easily assembled and prepared on a large scale via a simple one-pot procedure. X-ray crystallographic analyses show that the Pd metal center can coordinate in different fashions, where it relies on the size of the ?PR2group. With the same ligand scaffold, the ligand having a ?PCy2moiety displays better efficiency in expediting aromatic C-C bond-coupling reactions, while the ligand associated with a ?P-t-Bu2group, in contrast, promotes C-N bond-forming reactions.
A Tetraarylpyrrole-Based Phosphine Ligand for the Palladium-Catalyzed Amination of Aryl Chlorides
Sai, Masahiro
supporting information, p. 5422 - 5428 (2021/10/08)
A tetraarylpyrrole-based phosphine ligand L1 in combination with Pd(dba)2 provided a catalyst for the Buchwald-Hartwig amination reaction. A variety of amines were rapidly coupled with aryl chlorides at a Pd loading of 0.5 mol%. The selective monoarylation of aliphatic primary amines was achieved in the presence of 0.8 equiv. water. Comparison experiments were also conducted, which revealed that the catalytic activity of L1 is superior to representative phosphine ligands in the Pd-catalyzed C?N coupling of various amines. (Figure presented.).
