Results 31 to 40 of about 20,444 (199)
XRD Study of Hydrophlogopite Intercalated with Alkyl Quaternary Ammonium Salt
, 2010 Hydrophlogopite was modified with sodium and then organically intercalated with a series of alkyl quaternary ammonium salts. The organically intercalated samples were characterized by X-ray diffraction analysis (XRD) and the effect of alkyl quaternary ...
Tong Jiang Peng +3 more
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(2S,NS)-N-Allyl-N-benzyl-1-hydroxy-3-(4-hydroxyphenyl)-N-methylpropan-2-aminium bromide
Acta Crystallographica Section E, 2008 The title compound, C20H26NO2+·Br−, is an N-chiral quaternary ammonium salt synthesized from (2S*)-N-benzyl-N-methyltyrosine methyl ester. The dihedral angle between the phenyl ring and the benzene ring is 11.61 (19)°.
Hua-Fang Wu +4 more
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Preparation of New 2,3-Diphenylpropenoic Acid Esters – Good Yields Even for the More Hindered Z Isomers [PDF]
, 2004 The potassium salt of E- and Z-2,3-diphenylpropenoic acids prepared in situ could be esterified efficiently in DMSO with the appropriate alkyl halides at room temperature.
Boros, László +11 more
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Journal of Oral MicrobiologyObjectives Microbial contamination of various accessory parts of the dental chair units (DCUs) is an essential source of cross infection, while the accessories of the crucial suction function are usually overlooked.
Xuerong Lv +6 more
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CHIMIA, 2007 In this paper we review our recent studies into the phase-transfer catalysed asymmetric alkylation of glycine imines using quaternary ammonium salt catalysts derived from dihydrocinchonidine and ?-methylnaphthylamine.
Barry Lygo, Douglas J. Beaumont
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Heteroatom Chemistry, 2021 Tandem conjugate addition–alkylation reaction of various amines with α-bromo-α, β-unsaturated ketones resulted in near-quantitative conversions into the corresponding aziridines when the reaction was carried out in the presence of 10 mol% of phase ...
Alemayehu Mekonnen, Alemu Tesfaye
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Durable Antimicrobial Finishing of Nylon Fabrics with Acid Dyes and a Quaternary Ammonium Salt
, 2001 A new finishing method of preparing durable antimicrobial nylon fabrics, developed recently, uses acid dyes as bridges to link antimicrobial agents such as quaternary ammonium salts to synthetic fabrics.
Young Hee Kim, Gang Sun
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Palladium‐Catalyzed Direct C−H Arylation of Arenes Promoted by Quaternary Ammonium Salt
, 2020 A new Pd-based catalytic system for the direct C-H arylation of arenes was developed. The use of a substoichiometric amount of quaternary ammonium salt as an additive with a Pd source achieved the direct arylation of unactivated arenes under milder ...
Sabyuk Yang +3 more
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Synthesis and Catalytic Activity of Bifunctional Phase-Transfer Organocatalysts Based on Camphor
Molecules, 2023 Ten novel bifunctional quaternary ammonium salt phase-transfer organocatalysts were synthesized in four steps from (+)-camphor-derived 1,3-diamines. These quaternary ammonium salts contained either (thio)urea or squaramide hydrogen bond donor groups in ...
Luka Ciber +6 more
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Synthesis, characterization, and bioactivity of rosin quaternary ammonium salt derivatives [PDF]
BioResources, 2013 Two series of rosin quaternary ammonium salts (QAS) were synthesized using the same path. The structure of the target products was characterized by HPLC, MS, IR, and 1HNMR, and the bioactivity was determined by filter paper method using Trametes ...
Tao Liang +3 more
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