Retro-Diels-Alder Reactions of Masked Cyclopentadienones Catalyzed by Heterogeneous Brønsted Acids
作者:Anneleen L. W. Demuynck、Pieter Levecque、Aklilu Kidane、David W. Gammon、Eugene Sickle、Pierre A. Jacobs、Dirk E. De Vos、Bert F. Sels
DOI:10.1002/adsc.201000571
日期:2010.12.17
results suggest that retro-Diels–Alderreactions of tricyclodecadienones are catalyzed by Brønstedacids and the high catalytic performance of H-Beta catalysts can be ascribed to the optimal balance between the number of acid sites and their strength as well as to the accessibility of these sites. The methodology was then applied to a series of alkyl derivatives of cyclopentadienylcyclopentenones to provide
Alicyclic unsaturated compound, polymer, chemically amplified resist composition and method for forming pattern using said composition
申请人:Maeda Katsumi
公开号:US20060073408A1
公开(公告)日:2006-04-06
A noble alicyclic unsaturated compound represented by the general formula (1): wherein at least one of R
1
and R
2
is a fluorine atom or a fluorinated alkyl group; a polymer formed by the polymerization of a polymer precursor comprising the alicyclic compound. The polymer is useful, in the lithography using a light having a wavelength of 190 nm or less, as a chemically amplified resist which exhibits excellent transparency with respect to the light for use in exposure and also is excellent in the adhesion to a substrate and the resistance to dry etching.
通式(1)代表的高尚脂环族不饱和化合物: 其中至少一个 R
1
和 R
2
是氟原子或氟化烷基; 由包含该脂环族化合物的聚合物前体聚合而成的聚合物。在使用波长为 190 nm 或以下的光进行光刻时,该聚合物可用作化学放大抗蚀剂,它对用于曝光的光具有极佳的透明性,并且对基底具有极佳的附着力和耐干蚀刻性。
Camphor-derived sulfonylhydrazines: catalysts for Diels–Alder cycloadditions
Camphor-derived sulfonylhydrazines proved to be very active for organocatalyzed Diels-Alder cycloadditions with cyclopentadiene. Good chemical yields and enantiomeric excesses LIP to 89% and 88% are obtained for endo/exo adducts. (C) 2008 Published by Elsevier Ltd.
Agonist lead identification for the high affinity niacin receptor GPR109a
作者:Tawfik Gharbaoui、Philip J. Skinner、Young-Jun Shin、Claudia Averbuj、Jae-Kyu Jung、Benjamin R. Johnson、Tracy Duong、Marc Decaire、Jane Uy、Martin C. Cherrier、Peter J. Webb、Susan Y. Tamura、Ning Zou、Nathalie Rodriguez、P. Douglas Boatman、Carleton R. Sage、Andrew Lindstrom、Jerry Xu、Thomas O. Schrader、Brian M. Smith、Ruoping Chen、Jeremy G. Richman、Daniel T. Connolly、Steven L. Colletti、James R. Tata、Graeme Semple
DOI:10.1016/j.bmcl.2007.06.028
日期:2007.9
A strategy for lead identification of new agonists of GPR109a, starting from known compounds shown to activate the receptor, is described. Early compound triage led to the formulation of a binding hypothesis and eventually to our focus on a series of pyrazole acid derivatives. Further elaboration of these compounds provided a series of 5,5-fused pyrazoles to be used as lead compounds for further optimization. (C) 2007 Elsevier Ltd. All rights reserved.
Rapid Access to Tricyclic Systems: Highly Endoselective Diels-Alder Reaction of Cycloalkenones with Cyclic Dienes Under Microwave Irradiation
作者:M. Karthikeyan、R. Kamakshi、V. Sridar、B. S. R. Reddy
DOI:10.1081/scc-120026847
日期:2003.12.31
Cis fused ring systems are synthesized in good yields under microwave irradiation conditions in the presence of AlCl3 as a catalyst within short time periods.