Oxidative lactonization of C(sp3)-H bond in methyl aromatic alcohols enabled by proton-coupled electron transfer
作者:Shanyi Chen、Qihong Lai、Chao Liu、Hui Liu、Mingqiang Huang、Shunyou Cai
DOI:10.1007/s11426-022-1283-7
日期:2022.8
Direct functionalization of inert C(sp3)-H bonds in pharmaceutically significant compounds is very important in modern synthetic organic chemistry. In this article, we disclose a practical and efficient method for the oxidative lactonization of benzylic C(sp3)-H bonds enabled by the synergistic interactions of organic dye-type rose bengal, n-Bu4N·Br, O2 and Na2HPO4 under visible light irradiation.
Hemilian, Chemische Berichte, 1886, vol. 19, p. 2361
作者:Hemilian
DOI:——
日期:——
OVERLAY FILM FORMING COMPOSITION AND RESIST PATTERN FORMATION METHOD USING SAME
申请人:AZ ELECTRONIC MATERIALS (LUXEMBOURG) S.a.r.l.
公开号:US20150140490A1
公开(公告)日:2015-05-21
An object of the present invention is to provide a composition enabling to form a topcoat layer capable of preventing outgassing and of keeping deep UV light from impairing pattern shape in a lithographic process with extreme UV light. The object can be achieved by a composition of the invention for forming a topcoat layer. The composition contains a water-soluble polymer comprising hydrophilic groups and deep-UV absorbing groups absorbing light of 170 to 300 nm, and an aqueous solvent. The solvent comprises 70 weight % or more of water. The composition is cast on a resist layer and heated to harden, and thereafter the resist layer is subjected to exposure by use of extreme UV light and then developed to form a pattern.
Hemilian, Chemische Berichte, 1883, vol. 16, p. 2361