This report discloses the photochemical homolytic cleavage of iodine azide after its formation following release from polymer‐bound bisazido iodate(I) anions. A series of radical reactions are reported including the 1,2‐functionlization of alkenes and the unprecedented chemoselective oxidation of secondary alcohols in the presence of primary alcohols.
An efficient and practicalarenehydrogenation procedure based on the use of heterogeneous platinum group catalysts has been developed. Rh/C is the most effective catalyst for the hydrogenation of the aromatic ring, which can be conducted in iPrOH under neutral conditions and at ordinary to medium H2 pressures (<10 atm). A variety of arenes such as alkylbenzenes, benzoic acids, pyridines, furans, are
The synthesis of new liquid–crystalline mesogens containing bicyclohexane units
作者:R. Cassano、R. Dąbrowski、J. Dziaduszek、N. Picci、G. Chidichimo、G. De Filpo、R. Muzzalupo、F. Puoci
DOI:10.1016/j.tetlet.2006.12.094
日期:2007.2
The synthesis and mesomorphism characterization of new thermotropic derivatives of cis,trans and trans,trans-4,4′-bicyclohexyl-bis[4-(6-hydroxyhexan-1-oxy)benzoate] are described. This last intermediate produces a liquid crystalline diacrylate, with lower refractive indices than the well-known aromatic analogues, that allows to obtain polymeric network via UV photopolymerization. The acrylate is very
Resist lower-layer composition containing thermal acid generator, resist lower layer film-formed substrate, and patterning process
申请人:Ohsawa Youichi
公开号:US20100119970A1
公开(公告)日:2010-05-13
There is disclosed a resist lower-layer composition configured to be used by a multi-layer resist method used in lithography to form a layer lower than a photoresist layer acting as a resist upper layer film, wherein the resist lower-layer composition becomes insoluble or poorly-soluble in an alkaline developer after formation of the lower layer, and
wherein the resist lower-layer composition comprises, at least, a thermal acid generator for generating an acid represented by the general formula (1) by heating at a temperature of 100° C. or higher.
RCOO—CH
2
CF
2
SO
3
−
H
+
(1)
There can be provided a resist lower-layer composition in a multi-layer resist method (particularly, a two-layer resist method and a three-layer resist method), which composition is used to form a layer lower than a photoresist layer acting as a resist upper layer film, which composition becomes insoluble or poorly-soluble in an alkaline developer after formation of the lower layer, and which composition is capable of forming a resist lower layer film, intermediate-layered film, and the like having a higher anti-poisoning effect and exhibiting a lower load to the environment.