830351-14-9

Upstream product

• 542-92-7 cyclopenta-1,3-diene 
• 592-41-6 1-hexene 
• 145488-99-9 endo-7-propylbicyclo[3.2.0]hept-2-en-6-one 
• 137629-18-6 endo-7-butylbicyclo[3.2.0]hept-2-en-6-one 
• 142-61-0 Hexanoyl chloride 
• 77-73-6 dicyclopentadiene 
• 592-43-8 2-hexene 
• 77-73-6 bi(cyclopentadiene) 

Relevant academic research and scientific papers

Switchable Polymerization of Norbornene Derivatives by a Ferrocene-Palladium(II) Heteroscorpionate Complex

The ferrocene-chelating heteroscorpionate complex [(fc(PPh2){BH{(3,5-Me)2pz}2})PdMe] {(fcP,B)PdMe, fc = 1,1′-ferrocenediyl, pz = pyrazole} catalyzes the addition polymerization of norbornene and norbornene derivatives upon oxidation with [AcFc][BArF] {acetyl ferrocenium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate}. In situ reduction of [(fcP,B)PdMe][BArF] in the presence of a substituted norbornene results in significant decrease of catalytic activity. Addition of one equivalent of oxidant restores the activity.

MANUFACTURING METHOD OF NORBORNENE DERIVATIVE

PROBLEM TO BE SOLVED: To provide a manufacturing method of a norbornene derivative, which is excellent in yield and efficiency with simple equipment (reactor or the like) without using special equipment. SOLUTION: The above problem is solved by a manufacturing method of a norbornene derivative expressed by a general formula (3) (in the formula, R and Z are the same as below) characterized in that 5-norbornene-2-methyl magnesium halide expressed by the following general formula (1) (in the formula, X expresses a halogen atom) and a compound expressed by the general formula (2) (in the formula, Y expresses a halogen atom or the like, R expresses a hydrocarbon chain or the like, and Z expresses hydrogen or the like) are reacted at a temperature between -20°C to 60°C, under the presence of a monovalent copper compound. SELECTED DRAWING: None COPYRIGHT: (C)2021,JPOandINPIT

Stereoselectivity in a series of 7-alkylbicyclo[3.2.0]hept-2-enes: Experimental and computational perspectives

Rate constants for overall decomposition (kd) for a series of exo-7-alkylbicyclo[3.2.0]hept-2-enes are relatively invariant. For the alkyl substituents ethyl, propyl, butyl, isopropyl, and t-butyl, the ratio of the rate constant for [1,3] sigmatropic rearrangement to the rate constant for fragmentation, k13/kf, is significantly lower than k13/kf?=?150 observed for exo-7-methylbicyclo[3.2.0]hept-2-ene. Regardless of the size and mass of the alkyl group, the stereoselectivity of the [1,3] carbon migration appears to be quite stable at 80% to 89% suprafacial inversion (si), an observation consistent with conservation of angular momentum but not conservation of orbital symmetry. This global result comports with the phenomenon of “dynamic matching” espoused by Carpenter and collaborators for [1,3] sigmatropic rearrangements in general.

Novel Pd catalysts with β-diketiminates for homopolymerization of functionalized norbornene derivatives in water/organic mixed solvents

Polynorbornenes prepared by vinyl addition pathway are known to have some desirable characteristics for wider application but they have some critical drawbacks such as brittleness, poor solubility and adhesion. In order to improve these drawbacks, extensive research for the successful homo- and copolymerization of polar functionalized norbornene with olefin has been carried out. Even though considerable advance has been achieved in the polymerization of polar functionalized monomers, successful catalytic systems for the homopolymerization of polar functionalized norbornene are rare. In this study, a novel successful catalytic system for the polymerization of polar functionalized norborene is proposed. This system employs Pd β- diketiminate/borate cocatalyst in water/organic mixed solvents and it is unique due to introduction of water as a component of solvents. Polymers obtained in this study show high Mw with narrow PDI. Effects of several reaction parameters to the polymer activity and properties are investigated and optimal catalytic system are proposed.

Process for forming perfluorinated-alkyl sulfonamide substituted norbornene-type monomers

Embodiments in accordance with the present invention are directed to providing processes for forming fluorinated-alkyl and particularly perfluorinated-alkyl sulfonamide substituted norbornene-type monomers.