FLUORINATED SULFONATE ESTERS OF ARYL KETONES FOR NON-IONIC PHOTO-ACID GENERATORS
申请人:International Business Machines Corporation
公开号:US20180046077A1
公开(公告)日:2018-02-15
Non-ionic photo-acid generating (PAG) compounds were prepared that contain an aryl ketone group having a perfluorinated substituent alpha to the ketone carbonyl. The non-polymeric PAGs release a sulfonic acid when exposed to high energy radiation such as deep UV or extreme UV light. The photo-generated sulfonic acid has a low diffusion rate in an exposed resist layer subjected to a post-exposure bake (PEB) at 100° C. to 150° C., resulting in formation of good line patterns after development. At higher temperatures, the PAGs can also undergo a thermal reaction to form a sulfonic acid. The perfluorinated substituent provides improved thermal stability and hydrolytic/nucleophilic stability.
Cycloadditions of Aryl-Substituted 1,2,4-Triazines with 2-Cyclopropylidene-1,3-dimethylimidazolidine - Zwitterions as Discrete Intermediates
作者:Michael Ernd、Manfred Heuschmann、Hendrik Zipse
DOI:10.1002/hlca.200590120
日期:2005.6
Cycloadditions of 2-cyclopropylidene-1,3-dimethylimidazolidine (1), a strong, electron-rich C-nucleophile, with a variety of aryl-substituted1,2,4-triazines occur at temperatures between −100 and +100°, depending on the substitution pattern. At low temperatures, zwitterions, formed by nucleophilic attack of 1 on the triazines, could be detected spectroscopically and, in some cases, isolated. Two types
arene ring of arylglyoxals. A possible mechanism involving Fe(III)-promoted formation of a vinyl cation from arylglyoxal and alkyne, electrophilic addition of the vinyl cation to the ipso carbon of the aryl group to give a spiral intermediate, and then migration of the keto carbon to the ortho carbon was proposed as key steps and verified using quantum mechanics.
enantioselectivities (up to 96% ee). The present study describes the first successful examples of asymmetricconjugateaddition reactions of α-cyanoketones with benzoyl acrylonitriles. In addition, the DMM organocatalyst can be recovered and reused up to five times without significant loss of either catalytic activity or enantioselectivity. Publication History Received: 28 July 2020 Accepted after revision: 20 August
A fast and convenient synthesis and solid-state luminescence properties of new highly-substituted 6-amino-2H-pyran-2-one derivatives is described. These compounds were obtained from inexpensive and available 2-acyl(aroyl)-1,3-dicyano-1,3-bis-methoxycarbonylpropenides via regioselective heterocyclization under the action of sulfuric and hydroiodic acid. Compounds containing 6-amino-2H-pyran-2-one moiety