and electronic properties that partially mirror those of ureas, therefore demonstrating that the hydrofluorination of ynamides provides a general, straightforward, and user-friendly approach to bioisosteres of ureas, potent building blocks for biological studies and medicinal chemistry.
Copper-Catalyzed Tandem Decyclization-Cyclization Reaction of <i>N</i>-Alkynyl-3-hydroxyisoindolin-1-ones Generated from <i>N</i>-Alkynyl Phthalimides: Selective Synthesis of <i>ortho</i>-(2-Oxazolyl)phenyl Ketones
作者:Takuya Sueda、Noriko Okamoto、Reiko Yanada
DOI:10.1021/acs.joc.6b00888
日期:2016.7.1
ynamides) as a new subgroup of ynamides. Owing to the alkynyl motif on the nitrogen atom, alpha-hydroxy ynamides were easily isomerized to the corresponding ortho-(2-oxazolyl)phenyl ketones in a CuCl-catalyzed tandem decyclization-cyclization reaction under mild conditions.
REACTIVE MONOMER AND RESIN COMPOSITION CONTAINING SAME
申请人:Watanabe Hisashi
公开号:US20100059261A1
公开(公告)日:2010-03-11
A material for use in flexible printed wiring board having high reliability and allowing for processing fine wiring includes a compound represented by the following general formula (I):
wherein one of X and Y represents O and the other represents NAr
2
R
2
, and R
1
, R
2
, Ar
1
, and Ar
2
are as defined in the specification, and a resin composition comprising the compound as a reactive monomer.
NANOMODIFIED BACKBONES FOR POLYIMIDES WITH DIFUNCTIONAL AND MIXED-FUNCTIONALITY ENDCAPS
申请人:The Boeing Company
公开号:EP2990431A1
公开(公告)日:2016-03-02
Polyimides containing a backbone with at least one nanoparticle component and made from oligomers having endcaps that are difunctional or a mix of di- and monofunctionality are provided. The endcaps may be nadic or phenylethynyl. The backbone may be wholly inorganic or made from a mixture of inorganic and organic groups. The oligomers may be created in-situ using standard polymerization of monomeric reactants chemistry using a solvent or may be provided as a pre-imidized compound that may be either a solid or liquid. It is believed that the nanoparticle component of the polymer backbone provides superior thermo-oxidative stability verses unmodified organic backbones. It is further believed that providing difunctional or a mixture of di- and monofunctional endcaps allows for increased crosslinking to provide improved strength and stiffness verses wholly monofunctional endcapped oligomers for polyimides. The nanoparticle is part of the backbone of the polymer and not solely a pendant group.
<i>N</i>-Alkynyl Imides (Ynimides): Synthesis and Use as a Variant of Highly Labile Ethynamine
作者:Takuya Sueda、Ayumi Oshima、Naoki Teno
DOI:10.1021/ol2014973
日期:2011.8.5
This study describes the first reliable synthesis of N-alkynyl imides (ynimides). This was accomplished with a copper-catalyzed coupling reaction between alkynyl(triaryl)bismuthonium salts and five-membered imides. We also found that it was possible to utilize N-ethynyl phthalimide as a variant of the highly labile ethynamine. 4-Amino-1,2,3-triazole was successfully obtained via the CuAAC reaction of N-ethynyl phthalimide with azide followed by hydrazinolysis of the phthaloyl protecting group.