Rhodium(II)-Catalyzed Cyclization of Bis(N-tosylhydrazone)s: An Efficient Approach towards Polycyclic Aromatic Compounds
作者:Ying Xia、Zhenxing Liu、Qing Xiao、Peiyuan Qu、Rui Ge、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201201374
日期:2012.6.4
Ahead of the PAC: Polycyclicaromaticcompounds (PACs) can be easily accessed by the combination of Suzuki–Miyaura cross‐coupling and a [Rh2(OAc)4]‐catalyzed carbene reaction using easily available bis(N‐tosylhydrazone)s as intermediates (see scheme; Ts=4‐toluenesulfonyl).
predicted by in silico screening before synthesis. Efficient protocols for the synthesis of orthoquinone‐containing aromatic compounds by palladium‐mediated homocoupling and the benzoin condensation reaction were developed. Clear switching between orthoquinone and aromatic hydroquinone compounds was observed on the basis of their photoluminescence properties. Furthermore, the twist strain of the orthoquinone
COMPOSITION FOR FORMING RESIST UNDERLAYER FILM, RESIST UNDERLAYER FILM AND RESIST UNDERLAYER FILM-FORMING METHOD, AND PATTERN-FORMING METHOD
申请人:JSR CORPORATION
公开号:US20150198882A9
公开(公告)日:2015-07-16
A composition for forming a resist underlayer film includes a polymer having a structural unit represented by a formula (1). Ar
1
, Ar
2
, Ar
3
and Ar
4
each independently represent a divalent aromatic hydrocarbon group or a divalent heteroaromatic group. A part or all of hydrogen atoms included in the divalent aromatic hydrocarbon group and the divalent heteroaromatic group represented by Ar
1
, Ar
2
, Ar
3
or Ar
4
may be substituted. R
1
represents a single bond or a divalent hydrocarbon group having 1 to 20 carbon atoms. A part or all of hydrogen atoms included in the divalent hydrocarbon group represented by R
1
may be substituted. The divalent hydrocarbon group represented by R
1
may have an ester group, an ether group or a carbonyl group in a structure thereof. Y represents a carbonyl group or a sulfonyl group. m is 0 or 1. n is 0 or 1.