A highly selective sp3 C–N cleavage of tertiary anilines was achieved using the TBN/TEMPO catalyst system. When N,N-diaklylanilines (alkyl, benzyl) were employed, the N–CH3 bond was selectively cleaved via radical C–Hactivation. Moreover, when the allyl group was installed, totally reverse selectivity was observed. It is worth noting that the solvent effect is also crucial to obtain high reaction
Preparation of 3-aryl-2-aminoindoles, 3-allyl-3-amino-2-iminoindolines, and tetrahydro-[1,4]diazepino[2,3-b]indoles from 3-diazoindolin-2-imines
作者:Guorong Sheng、Kai Huang、Shicong Ma、Jing Qian、Ping Lu、Yanguang Wang
DOI:10.1039/c5cc03238e
日期:——
3-diazoindolin-2-imines with N,N-dialkylanilines, N-allyl-N-alkylanilines, and N-propargyl-N-alkylanilines and 3-diazoindolin-2-imines furnished 3-aryl-2-aminoindoles, 3-allyl-3-amino-2-iminoindolines, and tetrahydro-[1,4]diazepino[2,3-b]indoles, respectively. 3-Diazoindolin-2-imines acted as precursors of [small alpha]-imino rhodium carbenes in these transformations.
the imine-enamine equilibrium. One important improvement related to Fischer indole synthesis is direct vinylation of aryl hydroxyamines (Scheme 1b). Transition metal-catalyzed coupling with vinyl derivatives,23-27 gold-catalyzed addition to alkynes,28, 29 and conjugateaddition to electron-withdrawing alkynes30-33 have been used to achieve O-vinylation of N-aryl hydroxyamine, which is then followed by
Photosensitive resin composition, light-shielding color filter and production process therefor, and image sensor
申请人:FUJIFILM Corporation
公开号:EP2105792A1
公开(公告)日:2009-09-30
A photosensitive resin composition is provided that includes at least (A) titanium black, (B) two or more types of polymerizable compounds, (C) a resin, (D) a photopolymerization initiator, and (E) an organic solvent. There are also provided a light-shielding color filter formed by using the photosensitive resin composition, and a process for producing a light-shielding color filter, the process including a step of coating a substrate with the photosensitive resin composition, a step of imagewise exposing, and a step of developing to form a pattern. Furthermore, there is provided an image sensor that includes the light-shielding color filter.