78105-28-9

Usage

Uses

Used in Organic Synthesis:
1,4-Dimethylpyridinium p-toluenesulfonate is used as a phase-transfer catalyst for facilitating the transfer of reactants between immiscible phases, such as between an aqueous and organic layer, in chemical reactions. This enhances the efficiency and selectivity of the reactions, making it a crucial component in organic synthesis.
Used in Pharmaceutical Research:
In the pharmaceutical industry, 1,4-Dimethylpyridinium p-toluenesulfonate is utilized as a reagent in the synthesis of various organic compounds. Its mild and selective reactivity allows for the development of complex organic molecules that can be used in the creation of new drugs and pharmaceutical products.
Used in Chemical Reactions:
1,4-Dimethylpyridinium p-toluenesulfonate is employed in various chemical reactions to improve the reaction rate and selectivity. Its ability to transfer reactants between immiscible phases makes it a valuable catalyst in a wide range of chemical processes, contributing to the advancement of chemical research and development.

InChI:InChI=1/C7H10N.C7H8O3S/c1-7-3-5-8(2)6-4-7;1-6-2-4-7(5-3-6)11(8,9)10/h3-6H,1-2H3;2-5H,1H3,(H,8,9,10)/q+1;/p-1

Upstream product

• 108-89-4 picoline 
• 80-48-8 methyl p-toluene sulfonate 
• 98-59-9 p-toluenesulfonyl chloride 

Downstream Products

• 1026774-79-7 4-{2-[5-(piperidin-1-yl)-N-methylpyrrol-2-yl]vinyl}-1-methylpyridinium tosylate 
• 1026774-77-5 4-{2-[5-(piperidin-1-yl)thiophen-2-yl]vinyl}-1-methylpyridinium tosylate 
• 24235-06-1 4-(N, N-dimethylamino)-4'-N'-methyl-stilbazolium tosylate 
• 136023-74-0 4-bromobenzaldehyde-4'-N'-methylstilbazolium tosylate 

Relevant academic research and scientific papers

Growth, structural, thermal, dielectric and optical studies on HBST crystal: A potential THz emitter

The efficient organic nonlinear optical material 4-hydroxy benzaldehyde-N-methyl 4-stilbazolium tosylate (HBST) was grown from methanol by slope nucleation method combined with slow cooling (SNM-SC) for the first time. The optimum growth conditions based on the cooling rate was further investigated. The single crystal X-ray diffraction (XRD) revealed that the chromophores of HBST crystal make an angle of about 33° with respect to the a-axis, which is close to the optimum of Terahertz (THz)-wave generation and electro-optics applications. NMR and FT-IR spectral studies have been performed to ascertain various functional groups present in the sample. Futhermore, the thermal stability and decomposition stages were analyzed through TG-DTA and DSC techniques. The dielectric constant and dielectric loss of HBST crystal have been studied. Critical optical properties like the absorption coefficient, refractive index, cut-off wavelength and band gap energy were calculated. Photoluminescence (PL) exication studies indicated green emission occured at 507 nm. All the results of HBST crystal make it a promising candidate in the fields of optoelectronic and the generation of THz.

6MNEP: A molecular cation with large hyperpolarizability and promise for nonlinear optical applications

Molecular organic crystals are strategically designed for nonlinear optical applications using push-pull chromophores as the core feature. In this approach, electron-donating and accepting groups are connected through a π-conjugated bridge to obtain planar molecules with high hyperpolarizability. However, the non-centrosymmetric packing that is required for nonlinear optical (NLO) applications is a critical challenge that must be addressed to design useful materials. In this article, we present the new organic cation 6MNEP that shows a large hyperpolarizability and can be crystallized in ideal non-centrosymmetric structures for NLO applications, when paired with T and 4NBS anions. The 6MNEP cation was obtained by extending the conjugation length of already existing chromophores. We compare the 6MNEP crystals with other crystals that also have cations with extended conjugation lengths, but result in centrosymmetric crystal structures. Using the effective hyperpolarizability, we found 6MNEP-T and 6MNEP-4NBS to have 1.6 to 2.5 times larger macroscopic nonlinearities than benchmark NLO organic crystals. Additionally, the significantly lower absorption wavelength compared with other state-of-the-art crystals make 6MNEP-T and 6MNEP-4NBS promising materials for NLO applications like intense terahertz generation.

Asymmetric anthocyanin dye and application thereof

The invention provides a compound adopting an asymmetric anthocyanin dye structure. The compound has a general chemical structure formula (I). The compound has no fluorescence itself, but can produceintensive fluorescence signals when composited with RNA, has the intensity of the fluorescence signal directly proportional to the concentration of RNA and has high selectivity for RNA. Therefore, theconcentration of RNA in biological samples can be simply and quickly determined by use of the compound.

Unsymmetrical cyanine dyes and their application

The invention describes the preparation and use of fluorescent stains for nucleic acids derived from unsymmetrical cyanine dyes. The dyes of the invention possess superior fluorescent properties when complexed with nucleic acids, and have utility in any application which requires detection of nucleic acids, such as detection of nucleic acids in solution, in gels, in blots, in microarrays, and in bacteria and cells, and for use in analysis of cell structure, membrane integrity, and function. The dyes of the invention have the formula where X is O, S, or C(CH3)2; Each of R1 and R6 is independently hydrogen, carboxy, sulfo, sulfonamide, halogen, CN, or alkoxy; Each of t and s is an integer from 0 to 4; R2 is an alkyl, or alkyl group substituted by a carboxy, or a sulfo; R3 is H, C6H4CO2R7, or C6H4CH2N(R7)2, where R7 is an alkyl; R4 is H, alkyl, aryl, halogen, alkoxy, alkylamino, or alkylthio; R5 is an alkyl, aryl, alkyl group substituted by a carboxy, or a sulfo, or —(CH2)a—[O—(CH2)b]m—O—Z, where Z is H, alkyl, or carboxy; each of a and b is an integer from 1 to 4; m is an integer selected from 0 to 4.

A kind of high-yield, high-purity of the process for synthesizing source powder DAST

The invention discloses a high-yield high-purity DAST source powder synthetic process. The synthetic process comprises the following two steps: 1, reacting 4-methylpyridine with methyl p-toluenesulfonate in the presence of absolute ethyl alcohol serving as a solvent to obtain an absolute ethyl alcohol solution of 4-methyl-N-methylpyridine tosilate; and 2, reacting 4-methyl-N-methylpyridine tosilate with p-dimethylaminobenzaldehyde in the presence of absolute ethyl alcohol serving as a solvent and under the catalytic action of di-n-butylamine or piperidine, so as to obtain high-yield (85-95%) high-quality (90-95%) DAST source powder. According to the synthetic process, absolute ethyl alcohol is used as a reaction solvent, harm of poisonous and harmful solvents such as methylbenzene and methyl alcohol to the body of an operator can be avoided and the pollution of waste liquid to the environment can be avoided. The research success of the high-yield high-purity DAST source powder synthetic process is beneficial to culture of high-quality large-sized DAST crystal, thereby laying a good material and theoretical basis for research on the DAST crystal and related products.

Crystal growth, spectral, structural and optical studies of π-conjugated stilbazolium crystal: 4-Bromobenzaldehyde-4′-N′-methylstilbazolium tosylate

Nonlinear optical (NLO) organic compound, 4-bromobenzaldehyde-4′- N′-methylstilbazolium tosylate was synthesized by reflux method. The formation of molecular complex was confirmed from 1H NMR, FT-IR and FT-Raman spectral analyses. The single cr

Spectroscopic investigation on the efficient organic nonlinear crystals of pure and diethanolamine added DAST

4-N,N′-dimethylamino-N-methyl-4-stilbazolium toyslate (DAST) and diethanolamine (DEA) added DAST crystals are grown by slow cooling method. The corresponding powder samples are examined by characterization studies such as XRD, FT-IR, FT-Raman, UV-Vis-NIR

Single crystal preparation of DAST for terahertz-wave generation

DAST (1-methyl-4-{2-[4-(dimethylamino)phenyl]ethenyl}pyridinium p-toluenesulfonate) is a promising crystalline material for electro-optic applications and THz-wave generation. DAST powder for crystal growth was prepared by two synthesis routes including the conventional one and we confirmed that purity of DAST powder became indistinguishable after proper recrystallization even using conventional synthesis process. The highest solubility of DAST was found for methanol-acetonitrile mixture, and DAST crystal growth in this mixture or methanol-ethanol mixture gave thicker crystals than those grown in methanol. Thus, morphological control of DAST single crystals was found to be possible by varying solvents.

Carbon-silicon hyperconjugation X-ray structural study of N-methyl-4-trimethylsilylmethylpyridinium triflate

Hyperconjugation between the CH2-Si bond and the charged pyridinium π system in the N-methyl 4-trimethylsilylmethyl pyridinium ion (8), manifests in the crystal structure as lengthening of the CH2-Si bond, shortening of the CH2