- COMPOUND, PHOTORESIST COMPOSITION COMPRISING SAME, PHOTORESIST PATTERN COMPRISING SAME AND MANUFACTURING METHOD OF PHOTORESIST PATTERN
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The present specification provides a compound, a photoresist composition comprising the same, a photoresist pattern comprising the same, and a manufacturing method of the photoresist pattern, wherein the compound is represented by chemical formula 1. The photoresist composition comprising the compound according to the present application can freely configure the shape of the pattern.COPYRIGHT KIPO 2020
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Paragraph 0210-0212
(2020/06/10)
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- Norbornanyl rosin resin and process for preparing same
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This invention relates to the new norbornanyl rosin resin compositions which are easily obtainable by reacting the norbornenyl compounds or their alpha, beta-unsaturated esters with rosin derivative. In particular, this invention relates to a new process for making hybrid rosin resin suitable for production adhesive, ink, coating, plasticizer, thermoplastic or thermosetting plastic and functional polymers.
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Page/Page column 30
(2018/03/10)
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- Cyclopentadienyl binuclear chair-shaped cobalt-nitrogen complex as well as preparation method and application thereof
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The invention discloses a cyclopentadienyl binuclear chair-shaped cobalt-nitrogen complex as well as a preparation method and an application thereof. The complex utilizes bicyclo[2.2.1]-2-heptene-5,6-dicarboxylic acid as a main ligand, utilizes 1,10-phenanthroline as an auxiliary ligand and has a special cyclopentadienyl binuclear chair-shaped structure. The preparation method of the complex comprises steps as follows: the complex is synthesized from bicyclo[2.2.1]-2-heptene-5,6-dicarboxylic acid, cobalt salt and 1,10-phenanthroline as raw materials through one step, and [Co2[C7H8(COO)2]2(C12H8N2)2].5H2O crystals are obtained through self-volatilized crystallization. The preparation method is simple to operate, reaction conditions are mild, yield is high, product crystal phase is uniform, purity is high, and besides, the cobalt-nitrogen complex is stable in structure, shows better catalytic activity when applied to an esterification reaction as a catalyst, and is particularly suitable for catalyzing a reaction for synthesizing polyester from dibasic acid and dihydric alcohol.
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- Resolution of (±)-Bicyclo[2.2.1]hept-5-ene-trans-2,3-dicarboxylic Acid: Crystal Structure of Its Cinchoninium Salt
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Abstract: Single crystals of (+)-cinchoninium (+)-bicyclo[2.2.1]hept-5-ene-trans-2-carboxyl-3-carboxylate (S,S)-2 were obtained upon resolution of racemic (±)-bicyclo[2.2.1]hept-5-ene-trans-2,3-dicarboxylic acid rac-1 with (+)-cinchonine. An X ray diffraction analysis established the most important secondary interactions between the ions that are deemed responsible for the diastereomeric separation process. From (S,S)-2 enantiomerically pure (+)-bicyclo[2.2.1]hept-5-ene-trans-2,3-dicarboxylic acid (S,S)-1 was isolated in 72 % yield. Graphical Abstract: An X-ray diffraction analysis of (+)-cinchoninium (+)-bicyclo[2.2.1]hept-5-ene-trans-2-carboxyl-3-carboxylate (S,S)-2 established the most important secondary interactions between the ions that are deemed responsible for the diastereomeric separation process.[Figure not available: see fulltext.]
- Jiménez, Lissette,González, Teresa,Brice?o, Alexander,Agrifoglio, Giuseppe,Pastrán, Jesús,Dorta, Romano
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p. 203 - 207
(2016/05/02)
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- The effect of alumina on the Diels-Alder reactions of cyclopentadiene with menthyl acrylate and dimenthyl fumarate
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Alumina catalyzes the Diels-Alder reactions of cyclopentadiene with optically active menthyl acrylate and dimenthyl fumarate. Significant diastereoselectivity is observed in each case.
- Kabalka,Pagni,Bains,Hondrogiannis,Plesco,Kurt,Cox,Green
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p. 1283 - 1294
(2007/10/02)
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- Degenerate Thermal Rearrangement of 1,3-Dimethylenecyclopentane. Evidence for Partially Stereospecific Biradical Formation and Closure in 1,3 Shift
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Parolysis of 1,3-bis(dideuteriomethylene)cyclopentane at 370 deg C resulted in a first-order degenerate rearrangement in which the 1,3- and 3,3-shift products were formed in a 2:1 ratio, respectively, indicating the intermediacy of an effectively orthogonal 2,2'-bis(allylmethane) biradical.Pyrolysis of trans- and cis-4,5-dimethyl-1,3-dimethylenecyclopentane (T and C) gave 1,3- and 3,3-shift products with stereochemistry consistent with predominant conrotatory-bevel ring opening to produce the orthogonal diradical directly.Pyrolysis of optically active T gave the 1,3-shift products with 20.8percent inversion of configuration of the migrating carbon indicative of partial stereospecific closure of the biradical.Comparative pyrolysis of optically active T and its bis(dideuteriomethylene) derivative revealed no secondary kinetic deuterium isotop effect, but an alternation in the extent of racemization of starting material and amounts of 1,3- and 3,3-shift products indicates a product-determining isotope effect.These data provide further evidence for an intermediate.
- Gajewski, Joseph J.,Salazar, Jose Del C.
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p. 4145 - 4154
(2007/10/02)
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- Chiral rhodium-diphosphine catalyst capable of catalytic reduction of a tetramisole precursor to give a significant excess of the desired S-(-)isomer, levamisole
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A soluble, chiral, rhodium-containing catalyst which permits the catalytic reduction of prochiral 3-acyl-1-(2-alkoxyethyl)-4-phenyl-2-imidazolinones to chiral 3-acylimidazolidinones with a substantial excess of the desired S optical isomer. The 3-acylimidazolidinones may in turn be substantially converted to levamisole, and S isomer of tetramisole. The resolution of tetramisole to remove the R isomer is thus avoided.
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