54887-23-9Relevant academic research and scientific papers
Inclusion complex containing epoxy resin composition for semiconductor encapsulation
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, (2014/03/21)
The invention is an epoxy resin composition for sealing a semiconductor, including (A) an epoxy resin and (B) a clathrate complex. The clathrate complex is one of (b1) an aromatic carboxylic acid compound, and (b2) at least one imidazole compound represented by formula (II): wherein R2 represents a hydrogen atom, C1-C10 alkyl group, phenyl group, benzyl group or cyanoethyl group, and R3 to R5 represent a hydrogen atom, nitro group, halogen atom, C1-C20 alkyl group, phenyl group, benzyl group, hydroxymethyl group or C1-C20 acyl group. The composition has improved storage stability, retains flowability when sealing, and achieves an effective curing rate applicable for sealing delicate semiconductors.
Ligand-accelerated ortho -C-H alkylation of arylcarboxylic acids using alkyl boron reagents
Thuy-Boun, Peter S.,Villa, Giorgio,Dang, Devin,Richardson, Paul,Su, Shun,Yu, Jin-Quan
supporting information, p. 17508 - 17513 (2014/01/06)
A protocol for the Pd(II)-catalyzed ortho-C-H alkylation of phenylacetic and benzoic acids using alkylboron reagents is disclosed. Monoprotected amino acid ligands (MPAA) were found to significantly promote reactivity. Both potassium alkyltrifluoroborates and alkylboronic acids were compatible coupling partners. The possibility of a radical alkyl transfer to Pd(II) was also investigated.
Pincer thioamide and pincer thioimide palladium complexes catalyze highly efficient negishi coupling of primary and secondary alkyl zinc reagents at room temperature
Wang, Haibo,Liu, Jing,Deng, Yi,Min, Tianyin,Yu, Ganxiang,Wu, Xiaojun,Yang, Zhen,Lei, Aiwen
supporting information; experimental part, p. 1499 - 1507 (2009/08/07)
Pincer thioamide PdII complex 2 was prepared, and its reaction with cyclohexylzinc chloride yielded novel pincer thioimide PdII complex 3 besides Pd0 species. The structures of complexes 2 and 3 were confirmed by X-ray ana
Protoberberins from Reissert Compounds VI [1]. Diastereoselective Synthesis and Relative Configuration of 2-Benzoyl-1-cyano-1-(1-phenylalkyl)-1,2-dihydroisoquinolines
Reimann, Eberhard,Erdle, Wolfgang,Weigl, Claudia,Polborn, Kurt
, p. 313 - 326 (2007/10/03)
The alkylation of Reissert compounds 8 by sec-benzyl bromides 4, 7, and 10 diastereoselectively affords the title compounds 11 and 12. X-Ray structure analysis confirms an opposite configuration of the chiral centers in 11 and 12. The benzyl bromides 4, 7, and 10 are prepared by standard procedures.
The Reactions of Carbene Intermediates from the Reaction of Trialkyl Phosphites with Dialkyl Benzoylphosphonates: Intramolecular Cyclisations of 2-Substituted Dialkyl Benzoylphosphonates
Griffiths, D. Vaughan,Griffiths, Penelope A.,Karim, Khalku,Whitehead, Belinda J.
, p. 901 - 925 (2007/10/03)
The reaction of dialkyl aroylphosphonates 1 with trialkyl phosphites leads to the formation of carbene intermediates 3 via the anionic intermediates 2.The carbene intermediates 3 (R = 2-Me, 2-Prn, 2-Bun, 2-MeS, 2-EtO and 2-EtS) have
Directed Lithiation of Tertiary β-Amino Benzamides
Comins, Daniel L.,Brown, Jack D.
, p. 3566 - 3572 (2007/10/02)
The directed ortho-lithiation-alkylation of several tertiary β-amino benzamides was studied.The ortho-substituted β-amino benzamides were hydrolyzed directly with 6 N hydrochloric acid, or by a three-step, one-pot reaction involving methylation, elimination, and treatment with aqueous acid. o-Toluic acid, 2-n-butylbenzoic acid, 2-methoxy-6-methylbenzoic aicd, and 4-methoxy-2-methylbenzoic acid were prepared by using this ortho-metalation-hydrolysis methodology.Ortho-lithiation and reaction with benzaldehyde or dimethylformamide followed by hydrolysis with aqueous acid gave lactones in good yield.Methanolysis of N-(4-methoxy-2-methyl benzoyl)-N'-methylpiperizine with sulfuric acid/methanol gave methyl 4-methoxy-2-methylbenzoate in 71percent yield.The conversion of tertiary benzamides into ketones and aldehydes was examined.Treatment of certain tertiary benzamides with alkyllithium reagents gave ketones, while reaction with a modified aluminum hydride reagent gave aldehydes
THE SYNTHESIS OF 1,2,3-TRISUBSTITUTED BENZENES. FURTHER COMMENTS ON BENZYNES DERIVED FROM ARYL OXAZOLINES
Meyers, A. I.,Pansegrau, Paul D.
, p. 4935 - 4938 (2007/10/02)
Further investigation of organolithium addition to the 2,3-benzyne of aryl oxazolines reveals that addition takes place to give the 3-lithio (kinetic) and/or 2-lithio (thermodynamic) products depending on the nature of the organolithium reagent.
Further Evidence for Single Electron Transfer during the Alkylation of the Benzophenone Anil Dianion
Smith, James G.,Irwin, Douglas C.
, p. 2757 - 2759 (2007/10/02)
Evidence for single electon transfer (SET) in the alkylation of the benzophenone anil dianion was obtained by effecting the alkylation with 5-hexenyl halides and cyclopropylmethyl halides.Alkyl radicals derived from these alkyl halides are known to underg
