Hydrogen abstraction from methyl groups attached to an aromatic ring
作者:K.M. Baker、B.R. Davis
DOI:10.1016/s0040-4020(01)82795-2
日期:1969.1
The formation of cyclic ethers from methylgroupsattached to an aromatic ring via decomposition of the hypobromite of a tertiary benzylic alcohol in an ortho position is described. The reaction occurs only for tertiary hydroxyl groups, and groups other than methyl are not functionalized.
Fluorinated Dicarboxylic Acid Derivative and Polymer Obtained Therefrom
申请人:Isono Yoshimi
公开号:US20110301305A1
公开(公告)日:2011-12-08
According to the present invention, a polymer is obtained by polycondensation of a fluorinated dicarboxylic acid derivative of the general formula (M-1) or an acid anhydride of the fluorinated dicarboxylic acid with a polyfunctional compound having two to four reactive groups corresponding in reactivity to carbonyl moieties of the fluorinated dicarboxylic acid derivative or acid anhydride.
[Chem. 134]
AOCF
2
C-Q-CF
2
COA′ (M-1)
In the above formula, Q represents a divalent organic group having a substituted or unsubstituted aromatic ring; and A and A′ each independently represent an organic group. This polymer exhibits a sufficiently low dielectric constant for use as a semiconductor protection film and has the capability of forming a film at a relatively low temperature of 250° C. or lower.
Hydrogen-bond-acceptor ligands enable distal C(sp3)–H arylation of free alcohols
作者:Daniel A. Strassfeld、Chia-Yu Chen、Han Seul Park、D. Quang Phan、Jin-Quan Yu
DOI:10.1038/s41586-023-06485-8
日期:2023.10.5
The functionalization of C–H bonds in organic molecules is one of the most direct approaches for chemical synthesis. Recent advances in catalysis have allowed native chemical groups such as carboxylic acids, ketones and amines to control and directC(sp3)–H activation1,2,3,4. However, alcohols, among the most common functionalities in organic chemistry5, have remained intractable because of their low
Polymer, negative resist composition, and pattern forming process
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US10377842B2
公开(公告)日:2019-08-13
A polymer comprising recurring units derived from vinylanthraquinone, recurring units containing a benzene ring having a hydroxyl-bearing tertiary alkyl group bonded thereto, and recurring units derived from hydroxystyrene is provided. The polymer is used as a base resin to formulate a negative resist composition having a high resolution and minimal LER.