Photoinduced electron transfer cyclizations of aryl-linked phthalimides
摘要:
The photochemistry photochemistry of arene-linked phthalimides incorporating the carboxylate or thioether donor group was investigated. Simple N-phthalimidophenyl alkanoates exclusively gave photoreduction (CO2H/H-exchange) products. In contrast, omega-phthalimido-meta-phenoxy carboxylates underwent photodecarboxylative cyclizations in yields of 6-48%. Likewise, catechol-linked derivatives furnished analogue cyclization products in 18-38% yield. Using the photodecarboxylation protocol, macrocyclic target compounds with ring sizes up to 17 could thus be realized. Two model phthalimides containing a thioether branch at the ortho-position of the arene-linker gave the analogue seven-membered cyclization products in yields of 28% and 35%, respectively. (C) 2011 Elsevier Ltd. All rights reserved.
A novel chitosan-catalyzed transamidation of carboxamides with amines under solvent-free conditions is described. A series of amide derivatives as well as more challenging aryl and alkyl amines with long-chain alkyl substituents could be selectively converted into the corresponding transamidation products, which are frequently found in biologically active compounds and pharmaceuticals. Under similar reaction conditions benzo[d]heterocycles were also obtained via a one-pot synthesis through transamidation and subsequent dehydration. Recyclability of chitosan was demonstrated, with quantitative yields of products obtained without any loss of catalytic activity.
In this study, a visible-light-induced intermolecular C-H bond imidation of arenes was achieved at ambient condition. By using simple phthalimide with (diacetoxyiodo)benzene and molecular iodine, direct metal-/photocatalyst-free C-N bond formation was achieved. The imidation protocol was designed by using time-dependent density functional theory calculations and experimentally demonstrated for 28 substrates
Efficient photolytic C–H bond functionalization of alkylbenzene with hypervalent iodine(<scp>iii</scp>) reagent
作者:Ryu Sakamoto、Tsubasa Inada、Sermadurai Selvakumar、Shin A. Moteki、Keiji Maruoka
DOI:10.1039/c5cc07647a
日期:——
A practical approach to radical C–H bond functionalization by the photolysis of a hypervalent iodine(iii) reagent is presented.
通过光解高价碘(III)试剂实现对自由基C-H键的功能化的实用方法被提出。
[EN] PIGMENT, AND PIGMENT COMPOSITION, COLORING COMPOSITION AND COLOR FILTER USING THE SAME<br/>[FR] PIGMENT, ET COMPOSITION DE PIGMENT, COMPOSITION DE COLORATION ET FILTRE DE COULEUR L'UTILISANT
申请人:FUJIFILM CORP
公开号:WO2013146332A1
公开(公告)日:2013-10-03
Provided are a pigment excellent in the light stability, heat resistance, dispersibility, and color reproducibility without containing any metal-containing compound, a compound composing the pigment, and a pigment composition, a coloring composition, a colored radiation-sensitive composition, a color filter, an inkjet ink using the same, and a method of manufacturing colored radiation-sensitive composition. A pigment comprising at least either a compound represented by the formula (I) or a compound represented by the formula (II) below, the compound showing an absorbance of 0.5 or below at a wavelength of absorption maximum in the range from 300 to 700 nm, when contained in a filtrate obtained after adding 0.01% by weight of the compound into water, and, obtained after adding 0.01% by weight of the compound into 1-monomethyl ether 2-acetate, respectively followed by stirring at 25°C for 10 minutes, and filtering through a filter with a pore size of 0.20 µm. In the formulae (I) and (II), each of R1 to R12 independently represents a monovalent substituent.
N1-((Pyrazol-1-Ymethyl)-2-Methylphenyl)-Phatalamide Derivatives And Related Compounds Insecticides
申请人:Wada Katsuaki
公开号:US20070299085A1
公开(公告)日:2007-12-27
Novel benzenedicarboxamides of the formula (I) wherein X represents hydrogen, halogen atom, nitro, C
1-6
alkylsulfonyloxy, C
1-6
alkylsulfinyl, C
1-6
alkylsulfenyl or C
1-6
alkylsulfonyl, R
1
represents C
1-6
alkyl, C
1-6
alkylthio-C
1-6
alkyl, or C
1-6
alkyl, m represents 0 or 1, A represents O, S, SO, SO
2
, CH
2
or CH(CH
3
), and Q represents a 5- or 6-membered heterocyclic group that contains at least one hetero atom selected from the group consisting of N, O and S and can be optionally substituted; processes for their preparation, their intermediates and their use as insecticides.