4988-34-5

Usage

Uses

Used in Polymer Industry:
Pentamethylene is used as a monomer for the production of nylon-5,6, a type of synthetic polymer known for its strength, durability, and resistance to heat and chemicals.
Used in Pharmaceutical Industry:
Pentamethylene is used as a raw material in the manufacture of certain pharmaceuticals, contributing to the development of new drugs and medications.
Used in Chemical Industry:
Pentamethylene is used as a reagent in organic synthesis, enabling the production of various chemical compounds and intermediates.
Used in Corrosion Inhibition:
Pentamethylene is used as a corrosion inhibitor, helping to protect metal surfaces from degradation and extending the lifespan of industrial equipment and structures.

Upstream product

• 1613-51-0 sulfure de pentamethylene 
• 70284-20-7 N-bromo-N-potassio-p-toluenesulfonamide 
• 934-72-5 Methyl p-tolyl sulfoxide 

Downstream Products

• 175591-22-7 (βR,γR)-γ-ethyl-N,N,β-trimethyl-3-methoxybenzenepropanamine 
• 1557245-56-3 2-((4-amino-1H-pyrazol-1-yl)(phenyl)methyl)tetrahydro-2H-thiopyran-1,1-dioxide 

Relevant academic research and scientific papers

Oxygen Exchange between Sulphoxides and Sulphides. Part 3. The HCl-Catalysed Reduction of Aryl Methyl Sulphoxides by Dialkyl Sulphides in Aqueous Methanol

Dialkyl sulphides reduce aryl methyl sulphoxides in aqueous methanol in the presence of ca. 4 mol dm-3 HCl.Ring substitution in phenyl methyl sulphoxides moderately affects their reactivity towards dibutyl sulphide, the overall effect resulting in a Hammett ρ value of -1.6.This parameter is a measure of the effect of structural changes on a protonation pre-equilibrium, the formation of chlorosulphonium ion, and its subsequent partitioning between reduction and return to reactants by the action of water.Changing the alkyl moiety of the sulphides induces moderate reactivity changes suggesting a compensation of opposite polar and steric effects.Sulphoxides with electron-releasing groups display the highest selectivity towards dialkyl sulphides.When a large concentration of sulphide is used, both racemization of chiral sulphoxide and 18O exchange with the aqueous solvent are suppressed and this suggests that the species ArR1SCl+ is a common intermediate for these processes and for the reduction reaction.These and other kinetic findings indicate that the reduction step involves the displacement at the ArR1SCl+ chlorine of a sulphide by a sulphide molecule rather than by chloride ion and rules out, for the racemization too, the hypothesis involving a free halogen intermediate.

Mechanism of the Reaction of Dialkyl Sulphides with Bromamine T in Alkaline Medium

Bromamine T (p-MeC6H4SO2NBr-K+) reacts readily with dialkyl sulphides (R2S) to yield sulphoxides (R2SO) and sulphimides (R2SNTs).The kinetics of the reaction were investigated in buffered alkaline water-methanol solutions.In rate-determining steps HOBr and p-MeC6H4SO2NHBr formed in equilibrium reactions convert dialkyl sulphides into bromosulphonium (R2SBr+) intermediates (ρ* -1.22 and 1.11, ρI -13.3 and -14.4, respectively.).Electrophilic additions of Br+ to sulphur atom are significantly hindered by the steric effect of S-alkyl groups (δ 0.713 and 0.765, ρs 0.766 and 0.792, respectively).Products are rapidly formed from bromosulphonium ions by nucleophilic displacement with OH- and p-MeC6H4SO2NH- nucleophiles.Product distribution depends on pH and the concentration of p-MeC6H4SO2NH2 but is not influenced markedly by S-alkyl groups in sulphides.Results are compared with those obtained earlier for chloramine T.