74074-84-3Relevant academic research and scientific papers
Unexpected Role of p-Toluenesulfonylmethyl Isocyanide as a Sulfonylating Agent in Reactions with α-Bromocarbonyl Compounds
Chen, Jiajia,Guo, Wei,Wang, Zhenrong,Hu, Lin,Chen, Fan,Xia, Yuanzhi
, p. 5504 - 5512 (2016/07/13)
The reactions of p-toluenesulfonylmethyl isocyanide (TosMIC) with α-bromocarbonyl compounds leading efficiently to α-sulfonated ketones, esters, and amides were reported, in which an explicit new role of TosMIC as the sulfonylating agent was uncovered for the first time. Mechanistic study by control experiments and DFT calculations suggested that the reaction is initiated by Cu(OTf)2-catalyzed hydration of TosMIC to form a formamide intermediate, which undergoes facile C-S bond cleavage under the mediation of a Cs2CO3 additive.
POSITIVE RESIST COMPOSITION AND PATTERNING PROCESS
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, (2010/04/23)
A positive resist composition comprises (A) a resin component which becomes soluble in an alkaline developer under the action of an acid and (B) an acid generator. The resin (A) is a polymer comprising recurring units containing a non-leaving hydroxyl group represented by formula (1) wherein R1 is H, methyl or trifluoromethyl, X is a single bond or methylene, m is 1 or 2, and the hydroxyl group attaches to a secondary carbon atom. The composition is improved in resolution when processed by lithography.
Nitrogen-containing organic compound, resist composition and patterning process
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, (2008/06/13)
Resist compositions comprising nitrogen-containing organic compounds having a benzimidazole structure and a specific ether chain moiety have an excellent resolution, form precisely configured patterns with minimized roughness of sidewalls and are useful in microfabrication using electron beams or deep-UV light.
Reaction ofα- Halo Ketones with Nucleophiles
Russell, Glen A.,Ros, Fransisco
, p. 2506 - 2511 (2007/10/02)
p-Nitro- or p-cyanophenacyl chloride or the 1,1-dimethyl derivatives react with the anion of 2-nitropropane to form the C-alkilation product by a radical chain mechanism (SRN1).With the 1,1-dimethyl derivatives, the free radical substitution is photostimulated and occurs in competition with ionic reactions leading to the oxiranes 5 and hydroxy ketones 6.When K+ is used as the counterion, the SRN1 process is favored by complexation with 18-crown-6. p-Nitro-1,1-dimethylphenacyl chloride gives substitution products with diethyl malonate or diethyl mthylmalonate anions via the SRN1 process, but with PhS- or p-MeC6H4SO2-, substitution occurs by competing ionic and radical processes.Propylacetylenide anion reacts to form the oxirane 13a while diethyl phosphite or thiophosphite anions yield the enol phosphate 14a or thiophosphate 14b. 1,1-Dimethylphenacyl chloride reacts by nonradical processes to give the oxirane with acetylenide anions, the substitution products with PhS- or p-MeC6H4SO2- and a mixture of the enol phosphate, and oxirane 16 with diethyl phosphite anion.With Me2C==NO2-K+, mainly the oxirane is formed in Me2SO but mainly substitution via the SRN1 chain is observed in HMPA.
Addition/elimination reactions of an α-tosyl substituted sulfine with nucleophilic reagents
Leij, M. van der,Strijtveen, H. J. M.,Zwanenburg, B.
, p. 45 - 48 (2007/10/02)
Oxidation of methyl 2-methyl-2-p-(tolylsulfonyl)propanedithioate with m-chloroperbenzoic acid furnished the corresponding sulfine p-MeC6H4SO2CMe2C(=S=O)SMe (2).This sulfine that bears a leaving group at its α-carbon atom has especially been designed to in
