2327-56-2

Upstream product

• 3810-26-2 3-phenyl-2-cyclopenten-1-one 
• 56667-10-8 (RS)-1-phenylcyclopent-2-en-1-ol 12 
• 276-32-4 Bicyclo<6.3.0>undeca-1,3,5,8,10-pentaen 
• 65754-71-4 bicyclo<5.3.1>undeca-1,3,5,7,9-pentaene 
• 96288-20-9 1,1-dibromo-2-(1-phenylethenyl)cyclopropane 
• 108-86-1 bromobenzene 
• 930-30-3 cyclopent-2-enone 
• 100-59-4 phenylmagnesium chloride 
• 58189-55-2 2,2-Dibrom-1-vinyl-1-phenyl-cyclopropan 
• 70-11-1 α-bromoacetophenone 

Downstream Products

• 93989-30-1 2-Phenyl-4,5,6,7,10,10-hexachlor-4,7-endomethylen-4,7,8,9-tetrahydroinden 

Relevant academic research and scientific papers

METALLOCENE COMPOUND, PROCESS FOR PRODUCING METALLOCENE COMPOUND, OLEFIN POLYMERIZATION CATALYST, PROCESS FOR PRODUCING POLYOLEFIN, AND POLYOLEFIN

The metallocene compound according to the invention and the olefin polymerization catalyst containing the compound are intended to produce a catalyst capable of preparing an isotactic polymer with a high polymerization activity. The metallocene compound contains a substituted cyclopentadienyl group and a (substituted) fluorenyl group and has a structure wherein these groups are bridged by a hydrocarbon group or the like. The process for preparing a metallocene compound according to the invention is intended to selectively prepare a specific metallocene compound so as not to produce an isomer, and in this process an intermediate product is synthesized by a specific method. The process for preparing a polyolefin according to the invention is intended to prepare a polyolefin having excellent impact resistance and transparency, and this process comprises homopolymerizing an α-olefin of 3 to 8 carbon atoms or copolymerizing an olefin of 3 to 8 carbon atoms and another α-olefin in the presence of an olefin polymerization catalyst containing the above-mentioned metallocene compound.

Process for preparing cyclopentadienyl group-containing silicon compound or cyclopentadienyl group-containing germanium compound

Disclosed is a process for preparing a cyclopentadienyl group-containing silicon compound or a cyclopentadienyl group-containing germanium compound, comprising reacting (i) a lithium, sodium or potassium salt of a cyclopentadiene derivative with (ii) a silicon halide compound or a germanium halide compound in the presence of a cyanide or a thiocyanate. The cyanide or the thiocyanate is preferably a copper salt. According to the process of the invention, a cyclopentadienyl group-containing silicon compound or a cyclopentadienyl group-containing germanium compound, which is very useful for the preparation of a metallocene complex catalyst component, can be prepared in a high yield for a short period of time.

Formation and synthetic utility of benzyl- and phenyl-cyclopentadienylthallium

Benzyl- and phenyl-cyclopentadiene have been shown to react with thallium ethoxide in ethanol to give the corresponding benzyl- and phenyl-cyclopentadienylthallium compounds in excellent yield.These reagents are air stable for brief periods, have extended shelf-lives, and have been shown to be superior starting materials for the synthesis of a variety of cyclopentadienylmetal complexes.

Chemistry of gem-Dihalocyclopropanes. XX. The Effect of Methyl and Phenyl Substituents on the Vinylcyclopropylidene-Cyclopentenylidene Rearrangement

Reactions of gem-dibromocyclopropanes of the general structure 1 with methyllithium have been studied.In the most cases cyclopentadienes and/or vinylallenes are the products formed.The results obtained give evidence of a profound substituent effect on the carbene-carbene rearrangement leading to cyclopentadienes.We believe the effect is essentially steric in origin.The results support the mechanism proposed for the rearrangement.