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2 results about "SN2 reaction" patented technology
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The SN2 reaction is a type of reaction mechanism that is common in organic chemistry. In this mechanism, one bond is broken and one bond is formed synchronously, i.e., in one step. SN2 is a kind of nucleophilic substitution reaction mechanism. Since two reacting species are involved in the slow (rate-determining) step, this leads to the term substitution nucleophilic (bi-molecular) or SN2, the other major kind is SN1. Many other more specialized mechanisms describe substitution reactions.
A bispyridyl extractant, its preparation method and application as a nickel-cobalt extractant
This invention discloses a bispyridyl extractant, its preparation method, and its application as a nickel-cobalt extractant. The bispyridyl extractant has the following structure: wherein R is C 12 ~C 25 The alkyl group is prepared by reacting chloromethylpyridine hydrochloride with a primary amine compound via a bimolecular nucleophilic substitution reaction. This bispyridine extractant has stable physicochemical properties, large saturation capacity, good oil solubility of the extract, and good coordination complexing ability for nickel (cobalt) ions. It can be used in combination with DNNSA or P204 to form a synergistic extraction system for selective extraction and separation of nickel and cobalt in complex metal ion solution systems. It can also be used as a single extraction system for efficient extraction and separation of nickel and cobalt in hydrochloric acid systems, showing good prospects for industrial application.
Owner:CENT SOUTH UNIV
Novel chiral covalent organic framework material as well as preparation method and application thereof
PendingCN121248871AOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsPtru catalystChiral selectivity
The invention discloses a novel chiral covalent organic framework material as well as a preparation method and application thereof. The chiral covalent organic framework compound is prepared by the following steps: carrying out Mitsunobo or SN2 reaction, Ullmann coupling and reduction reaction on chiral diol and iodohydroxy ethyl nicotinate to obtain an axial chiral bipyridine aldehyde group monomer, and carrying out Schiff base reaction on the axial chiral bipyridine aldehyde group monomer and a polyamino substituted monomer under a solvothermal condition. The chiral covalent organic framework compound disclosed by the invention can be complexed with various metals such as palladium, copper, nickel and the like to form a heterogeneous catalyst for asymmetric reaction, shows good catalytic effect and chiral selectivity, and also has good chemical stability; after the reaction, separation and recovery of the catalyst can be realized through simple centrifugation or filtration, so that the environmental pollution is effectively reduced, the cost is reduced, and the application prospect is good.
Owner:ZHEJIANG UNIV OF TECH