LIQUID CRYSTAL POLYIMIDE, LIQUID CRYSTAL RESIN COMPOSITION CONTAINING SAME, AND RESIN FILM FOR SEMICONDUCTOR ELEMENTS
申请人:UEDA Mitsuru
公开号:US20120123050A1
公开(公告)日:2012-05-17
A liquid crystal polyimide, containing: repeating units of formula (I) and having liquid crystallinity,
wherein A
1
and A
2
are each independently a tetravalent residue of a tetracarboxylic acid, B
1
is a residue of a bis(amino)polysiloxane of formula (II), and C
1
is a residue of an organic diamine,
wherein R
1
to R
6
are each independently a lower alkyl group, x is from 0 to 10, D
1
is an alkylene group, y is 0 or 1, and Z
1
is selected from the group consisting of —H, —CH
3
, CF
3
, —F, —CN and —NO
2
. In addition, a liquid crystal resin composition and a resin film for a semiconductor element containing the liquid crystal polyimide.
Liquid crystal polyimide, liquid crystal resin composition containing same, and resin film for semiconductor elements
申请人:Ueda Mitsuru
公开号:US08415451B2
公开(公告)日:2013-04-09
A liquid crystal polyimide, containing: repeating units of formula (I) and having liquid crystallinity,
wherein A1 and A2 are each independently a tetravalent residue of a tetracarboxylic acid, B1 is a residue of a bis(amino) polysiloxane of formula (II), and C1 is a residue of an organic diamine,
wherein R1 to R6 are each independently a lower alkyl group, x is from 0 to 10, D1 is an alkylene group, y is 0 or 1, and Z1 is selected from the group consisting of —H, —CH3, CF3, —F, —CN and —NO2. In addition, a liquid crystal resin composition and a resin film for a semiconductor element containing the liquid crystal polyimide.
Alkene 1,3‐Difluorination via Transient Oxonium Intermediates
作者:Alice C. Dean、E. Harvey Randle、Andrew J. D. Lacey、Guilherme A. Marczak Giorio、Sayad Doobary、Benjamin D. Cons、Alastair J. J. Lennox
DOI:10.1002/anie.202404666
日期:2024.7.22
diastereoselective hypervalentiodine-mediated 1,3-difluorination of homoallylic (aryl) ethers. The transformation proceeds through a transiently formed oxonium intermediate that is opened by fluoride to rearrange an alkyl chain. The protocol is scalable and tolerates a variety of functional groups and substitution on the alkenyl chain. Mechanistic studies reveal key insights into the reaction selectivity.
[EN] LIQUID CRYSTAL POLYIMIDE, LIQUID CRYSTAL RESIN COMPOSITE CONTAINING SAME, AND RESIN FILM FOR SEMICONDUCTOR ELEMENTS<br/>[FR] POLYIMIDE CRISTAL LIQUIDE, COMPOSITE DE RÉSINE CRISTAL LIQUIDE LE CONTENANT ET FILM DE RÉSINE POUR ÉLÉMENTS À SEMI-CONDUCTEUR