Le chauffage de l'endo-phenyl-2 exo-trithia-3,4,5tricyclo [5.2.1.0 2,6 ] decane avec le norbornene a 100°C donne l'exo-trithia-3,4,5tricyclo [5.2. 1.0 2,6 ] decane et le 苯基-2 降冰片烯,parune 反应 de transfert de S 3
Synchronous enantiomeric enrichment of both reactant and product by absolute asymmetric synthesis using circularly polarized light. Part 3. Numerical simulation and experimental verification of the reversible asymmetric photoisomerization between methyl norbornadiene-2-carboxylate and methyl quadricyclane-1-carboxylate
摘要:
在本系列的第一篇论文中,我们提出了一种新的圆偏振光(CPL)绝对不对称合成(NAAS),它可以分为两个子类:(a)可逆NAAS(CPL同时激发反应物和产物),( b) 不可逆NAAS(反应物仅被CPL激发)。在本文中,我们讨论可逆 NAAS。数值模拟是基于本系列前一篇论文的结果进行的。利用降冰片二烯-2-甲酸甲酯(I)和四环烷-1-甲酸甲酯(II)之间的可逆光致异构化,实验验证了反应物和产物的对映体过量(ee's)不仅取决于各向异性两个组分的因子 (g = Δε/ε),而且还影响正向和反向反应的相对量子产率。在可逆NAAS的情况下,如果我们适当地选择系统和CPL照射波长,反应物和产物的ee将根据转化同时增加,并且在光稳态下获得可观的值产物和反应物的g因子足够大,产物的g因子的符号与反应物的g因子相反,并且光化学平衡常数K小于1。
BASIC COMPOUND, CHEMICALLY AMPLIFIED RESIST COMPOSITION, AND PATTERNING PROCESS
申请人:Hatakeyama Jun
公开号:US20120141938A1
公开(公告)日:2012-06-07
A chemically amplified resist composition comprising a base polymer, an acid generator, and an amine quencher in the form of a β-alanine, γ-aminobutyric acid or 5-aminovaleric acid derivative having an acid labile group-substituted carboxyl group has a high contrast of alkaline dissolution rate before and after exposure and forms a pattern of good profile at a high resolution, minimal roughness and wide focus margin.
Photoinduced Intramolecular Cyclopentanation vs Photoprotolytic Oxametathesis in Polycyclic Alkenes Outfitted with Conformationally Constrained Aroylmethyl Chromophores
作者:Roman A. Valiulin、Teresa M. Arisco、Andrei G. Kutateladze
DOI:10.1021/jo301909j
日期:2013.3.1
Intramolecular photoinduced cyclizations are investigated in photoprecursors assembled in a modular fashion via a Diels–Alderreaction of acetylenic dienophiles with subsequent Michael additions of aromatic ketones to install a chromophore capable of initiating Paternò–Büchi cycloadditions or radical cyclization cascades. The protolytic oxametathesis in these systems allows for rapidaccess to novel
MONOMER, POLYMER, RESIST COMPOSITION, AND PATTERNING PROCESS
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US20170131635A1
公开(公告)日:2017-05-11
A monomer of formula (1a) or (1b) is provided wherein A is a polymerizable group, R
1
-R
6
are monovalent hydrocarbon groups, X
1
is a divalent hydrocarbon group, Z
1
is an aliphatic group, Z
2
forms an alicyclic group, k=0 or 1, m=1 or 2, n=1 to 4. A useful polymer is obtained by polymerizing the monomer. A resist composition comprising the polymer has improved development properties and is processed to form a negative pattern having high contrast, high resolution and etch resistance which is insoluble in alkaline developer.
CpRuCl(PPh<sub>3</sub>)<sub>2</sub>-Catalyzed Cyclopropanation of Bicyclic Alkenes with Tertiary Propargylic Acetates
作者:Alphonse Tenaglia、Sylvain Marc
DOI:10.1021/jo060276a
日期:2006.4.1
The electron-rich cyclopentadienylruthenium complex CpRuCl(PPh3)2 turns out to be an efficient catalyst for the regio- and stereoselective cyclopropanation of bicyclic alkenes with tertiary propargylic carboxylates. The reaction provides 1,2,3-trisubstituted cyclopropanes in high yields as a single stereoisomer instead of the expected cyclobutenes via [2 + 2] cycloaddition. Functional groups such as
RESIST COMPOSITION, PATTERNING PROCESS, AND BARIUM, CESIUM AND CERIUM SALTS
申请人:SHIN-ETSU CHEMICAL CO., LTD.
公开号:US20170115566A1
公开(公告)日:2017-04-27
A resist composition comprising a base resin comprising acid labile group-containing recurring units and preferably acid generator-containing recurring units, and a sodium, magnesium, potassium, calcium, rubidium, strontium, yttrium, cesium, barium or cerium salt of α-fluorinated sulfonic acid bonded to an alkyl, alkenyl, alkynyl or aryl group exhibits a high resolution and sensitivity and forms a pattern of satisfactory profile with minimal LWR after exposure and development.