NOVEL COMPOUND HAVING MULTIMER STRUCTURE OF XANTHENE DERIVATIVE, COLORING COMPOSITION, INK FOR INKJET RECORDING, METHOD OF INKJET RECORDING, COLOR FILTER, AND COLOR TONER
申请人:FUJIFILM CORPORATION
公开号:US20140176653A1
公开(公告)日:2014-06-26
There is provided a compound represented by formula (1):
in formula (1), L represents a divalent to tetravalent linking group; D represents a residue obtained by removing 1 to 5 hydrogen atoms from a compound represented by formula (2); m represents an integer of 1 to 10, however, each L may be the same with or different from every other L; n represents an integer of 2 to 10, however, each D may be the same with or different from every other D; and in formula (2), each of R
4
to R
24
independently represents a hydrogen atom or a substituent, provided that formula (2) has at least one or more ionic hydrophilic groups.
A process for producing an amine which is characterized by reacting an imine with a nucleophilic compound (except a trialkylsilyl vinyl ether) in the presence of a phosphoric acid derivative represented by the formula (1):
wherein A
1
represents a spacer; X
1
and X
2
represent each independently a divalent nonmetal atom or a divalent nonmetal atomic group; and Y
1
is oxygen or sulfur. The invention provides a process by which amines (particularly optically active amines) useful as intermediates of medicines, agricultural chemicals, or the like can be produced without special post-treatment in high yield at high optical purity; and phosphoric acid derivatives (particularly optically active phosphoric acid derivatives) useful in the production of the amines.
Ni-N (amine) distances [l]. On the other hand, the effects mentioned above may increase the acidity of the amidic hydrogen so that the amides could become anions in basic solution; the latter are good udonors. Thus high-valent metalcomplexes are expected to be formed with multiamido ligands.
A Versatile Synthesis of Vinyl-Substituted Heterocycles via Regio- and Enantioselective Pd-Catalyzed Tandem Allylic Substitution
作者:Chao Qian、Wenjun Tang
DOI:10.1021/acs.orglett.0c01490
日期:2020.6.5
We herein report a versatile, regio- and enantioselective palladium-catalyzed tandem allylicsubstitution powered by a chiral bisphosphorus ligand WingPhos with the palladium loading as low as 0.1 mol %, forming a series of chiral vinyl-substituted heterocycles, including tetrahydroquinoxalines, piperazines, dihydro-2H-benzo[b][1,4]-oxazines, and morpholines, in exellent ee’s and yields. The protocol
我们在本文中报道了一种手性双磷配体WingPhos驱动的多功能,区域和对映体选择性的钯催化串联烯丙基取代,钯载量低至0.1 mol%,形成了一系列手性乙烯基取代的杂环,包括四氢喹喔啉,哌嗪,二氢-2 H-苯并[ b ] [1,4]-恶嗪和吗啉的优异ee和收率。该方案具有易于获得的起始原料,温和的反应条件和广泛的底物范围。机制研究支持串联烯丙基取代过程。
Pd(II)-Catalyzed Aerobic Intermolecular 1,2-Diamination of Conjugated Dienes: A Regio- and Chemoselective [4 + 2] Annulation for the Synthesis of Tetrahydroquinoxalines
作者:Zhengxing Wu、Ke Wen、Jingang Zhang、Wanbin Zhang
DOI:10.1021/acs.orglett.7b00919
日期:2017.6.2
A Pd(II)-catalyzed aerobic intermolecular 1,2-diamination of conjugateddienes was developed for the regio- and chemoselective preparation of a variety of functionalized tetrahydroquinoxalines, using simple sulfonyl protected o-phenylendiamines as a nitrogen source. This methodology provides a direct and efficient synthesis of tetrahydroquinoxalines. O2 was used as the stoichiometric oxidant, and reaction