59265-70-2Relevant academic research and scientific papers
A catalyst-free protocol for direct oxidative esterification of alcohols and aldehydes
Rajbongshi, Kamal Krishna,Sarma, Manas Jyoti,Phukan, Prodeep
, p. 5358 - 5360 (2014)
A fast, simple, and efficient protocol for the direct conversion of alcohols and aldehydes to methyl ester has been developed using TsNBr2without any catalyst. The one pot reaction proceeds in the presence of a base at room temperature in methanol, to produce the corresponding methyl ester in high yield within a short time.
Formation of esters and amides via metal-free Csp2-Csp3 bond cleavage of α-nitro ketone: Mechanistic insight to the reaction pathway
Sarma, Manas Jyoti,Phukan, Prodeep
, p. 523 - 533 (2019/05/21)
A catalyst free protocol for hucleophilic Csp2-Csp3 bond cleavage of a-nitroketone has been achieved for the formation of C-O and C-N bond. A series of differently substituted a-nitroketones could be selectively cleaved and converted into corresponding esters and tosylamides in presence of alcohols and bromamine-T respectively. Mechanism of the C-C bond cleavage has been proposed by identifying different reaction intermediates using IR and NMR spectroscopic methods.
Facile esterification of carboxylic acid using amide functionalized benzimidazolium dicationic ionic liquids
Muskawar, Prashant Narayan,Thenmozhi,Gajbhiye, Jayant M.,Bhagat, Pundlik Rambhau
, p. 214 - 220 (2014/07/08)
Herein, we report the synthesis of a new series of amide functionalized dicationic benzimidazolium based ionic liquids (DBimILs) and appraised their efficacy towards perceptive esterification of carboxylic acids with alkyl/allyl/aryl halides in presence of triethylamine. The amide groups present in this new series of DBimILs are expected to form hydrogen bonding with the carboxylic acids and this could facilitate the esterification reactions under mild conditions devoid of any added catalyst or organic solvent. The plausible mechanism for the enhanced catalytic activity in presence of this new series of ILs has been proposed. The corresponding alkyl/allyl/aryl esters isolated from this reaction were of high purity after simple extraction, which wipe out the necessity for further purification. This protocol addresses clean methodology and the efficient recyclability as well as reusability of the catalyst.
Inclusion complex containing epoxy resin composition for semiconductor encapsulation
-
, (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.
Carbon-carbon bond cleavage and esterification of phenylacetonitrile and its derivatives affording the corresponding benzoic esters
Wang, Zhiyuan,Kang, Junhui,Yu, Mingxin
, p. 323 - 324 (2008/02/10)
Phenylacetonitrile and its derivatives were treated with alcohols in the presence of potassium iodide and iodine affording the corresponding benzoate esters via degradation, oxidation and esterification under mild conditions. The products were characterised by IR, 1H NMR, MS and elemental analysis.
Photooxygenation of nitrobenzyl derivatives. Mechanism of photogeneration and hydrolysis of α-hydroperoxy nitrobenzyl ethers
Wan, Peter,Muralidharan, S.,McAuley, Iain,Babbage, Christopher A.
, p. 1775 - 1783 (2007/10/02)
The photooxygenation of nitrobenzyl derivatives 1-10 has been studied in aqueous solution as a function of pH.For m-nitrobenzyl ethers 2-4 and 9, stable α-hydroperoxy ethers (11-13) are the primary photochemical products.Acid hydrolysis of 11-13 gives m-nitrobenzaldehyde and hydrogen peroxide.Quantum yields for photooxygenation are reported for a number of derivatives as a function of pH.Acid and base catalyses of photooxygenation are observed for several compounds.A mechanism involving photogenerated nitrobenzyl carbanion intermediates is proposed.
