Design and Synthesis of a Photoaromatization-Based Two-Stage Photobase Generator for Pitch Division Lithography
作者:Yuji Hagiwara、Ryan A. Mesch、Takanori Kawakami、Masahiro Okazaki、Steffen Jockusch、Yongjun Li、Nicholas J. Turro、C. Grant Willson
DOI:10.1021/jo3021488
日期:2013.3.1
The synthesis of a two-stage photobase generator (PBG) based on photoinduced aromatization is described. This material was designed for use in resolution-enhanced photolithography. Computer modeling predicts that a delay in the onset of base generation can lead to improved image quality. This delay can be realized by a PBG that must undergo two sequential photoreactions for each molecule of base generated Toward that end, latent PBGs were designed that are oxime esters of aliphatic acids, which undergo Norrish type II reactions to yield oxime esters of aromatic acids that are efficient PBGs.
Kraus, George A.; Cui, Wenge, Synlett, 2003, # 1, p. 95 - 96
作者:Kraus, George A.、Cui, Wenge
DOI:——
日期:——
Enantioselective Synthesis of <i>cis</i>‐Decalins by Merging the Birch Reduction and Inverse‐Electron‐Demand Diels–Alder Reaction
作者:Xu‐Ge Si、Shi‐Xiong Feng、Zhuo‐Yan Wang、Xiaoyu Chen、Meng‐Meng Xu、Yu‐Zhen Zhang、Jun‐Xiong He、Limin Yang、Quan Cai
DOI:10.1002/anie.202303876
日期:2023.8.7
Asymmetric synthesis of highly functionalized chiral cis-decalins was realized by merging Birchreduction and a tandem olefin migration/asymmetric IEDDA reaction. Up to six contiguous and two quaternary stereocenters could be formed in one step by efficient kinetic resolution. The synthetic value of the approach is illustrated by the concise total synthesis of (+)-occidentalol and the synthesis of