Photosynthesis of 3-Alkylated Coumarins from Carboxylic Acids Catalyzed by a Na<sub>2</sub>S-Based Electron Donor–Acceptor Complex
作者:Hai-Yang Song、Mei-Yi Liu、Jing Huang、Dan Wang、Jun Jiang、Jin-Yang Chen、Tian-Bao Yang、Wei-Min He
DOI:10.1021/acs.joc.2c02679
日期:2023.2.17
strategy to synthesize various 3-alkylated coumarins from easily available coumarins and naturally abundant carboxylicacids under photocatalyst-, oxidant-, and additive-free and mild conditions is reported. Using Na2S as the catalytic electron donor, a series of primary, secondary, and tertiary carbon radicals can be efficiently generated, and the EDA complex can be regenerated without an alkaline additive
Photoresist underlayer film-forming composition and pattern forming process
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP2813891A2
公开(公告)日:2014-12-17
In lithography, a composition comprising a novolak resin comprising recurring units of hydroxycoumarin is used to form a photoresist underlayer film. The underlayer film is strippable in alkaline water, without causing damage to ion-implanted Si substrates or SiO2 substrates.
v. Pechmann; Welsh, Chemische Berichte, 1884, vol. 17, p. 1649
作者:v. Pechmann、Welsh
DOI:——
日期:——
UNDERLAYER FILM-FORMING COMPOSITION AND PATTERN FORMING PROCESS
申请人:SHIN-ETSU CHEMICAL CO., LTD.
公开号:US20140363956A1
公开(公告)日:2014-12-11
In lithography, a composition comprising a novolak resin comprising recurring units of hydroxycoumarin is used to form a photoresist underlayer film. The underlayer film is strippable in alkaline water, without causing damage to ion-implanted Si substrates or SiO
2
substrates.