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Usage

Uses

Used in Organic Synthesis:
Pyridinium, 4-ethenyl-1-methyl-, bromide is utilized as a reactant or catalyst in organic synthesis due to its ability to engage in multiple types of chemical reactions, making it a versatile component in the creation of various organic compounds.
Used in Pharmaceutical Production:
Pyridinium, 4-ethenyl-1-methyl-, bromide also finds application in the pharmaceutical industry, where it may be used in the synthesis of drugs or as a catalyst to facilitate specific chemical reactions required for drug production.
Used in Specialty Chemicals Production:
Pyridinium, 4-ethenyl-1-methyl-, bromide is employed in the manufacturing process of specialty chemicals, where its unique reactivity contributes to the development of specific chemical products.
Safety Precautions:
It is crucial to handle Pyridinium, 4-ethenyl-1-methyl-, bromide with care and implement proper safety measures to prevent any adverse effects on health or the environment.

Upstream product

• 100-43-6 4-vinylpyridine 
• 74-83-9 methyl bromide 

Relevant academic research and scientific papers

Formation of 1,2-bis(1-methyl-1,4-dihydro-4-pyridinylidene)cyclobutane by dehydrogenated intermolecular cyclization of 4-vinyl-1-methylpyridinyl radical

The one-electron reduction of 4-vinyl-1-methylpyridinium bromide with sodium amalgam in degassed acetonitrile at 0 °C leads to the formation of 1,2-bis(1-methyl-1,4-dihydro-4-pyridinylidene)cyclobutane, which is characterized by means of 1HNMR, 13CNMR, and UV-vis absorption spectroscopy. Copyright

Rate-Determining Steps in Michael-Type Additions and E1cb Reactions in Aqueous Solution

Rates of equilibration of a series of 10 substituted pyridines and five Michael acceptors (CH2=CHZ, Z = CHO, COCH3, SO2CH3, CN and CONH2) with the corresponding N(ZCH2CH2) pyridinium cations have been measured in aqueous solution at ionic strength 0.1 and 25 deg C.Analysis of the dependence of the pseudo-first-order rate constants for equilibration as a function of acceptor concentration and of pH allows the evaluation of the second-order rate constants (kNu) for the nucleophilic attack of each of these pyridines upon each of these acceptors and also the second-order rate constants (kOH) for the hydroxide ion catalyzed E1cb elimination reaction which is the microscopic reverse of each of these Michael-type addition reactions.Broensted-type plots for each of these processes as a function of the basicity of the substituted pyridine are concave down for each of Z = CHO, COCH3, and CN and are consistent with a change from rate-determining nucleophilic attack for the more basic pyridines to rate-determining protonation of the carbanionic intermediate by a water molecule for less basic pyridines and the corresponding microscopic reverse processes in the elimination reactions.The "break" in these Broensted-type plots is shown to occur at a pyridine basicity that is a function of the Z-activating substituent.Broensted β1g and βnuc are evaluated for each rate-determining step (wherever accessible); these two parameters are shown to pass through minima as a function of reactivity. βeq is shown to be a simple linear function of reactivity (as log kNu) for nucleophilic addition to the acceptor species, although Keq is relatively insensitive to the nature of the Z-activating substituent.