66832-54-0

Upstream product

• 615-13-4 2-indanone 
• 530-50-7 1,1-Diphenylhydrazine 
• 591-50-4 iodobenzene 
• 108-86-1 bromobenzene 
• 3254-91-9 5,10-dihydroindeno[1,2-b]indole 

Relevant academic research and scientific papers

Nickel-catalyzed C-N crossing coupling reaction: The synthetic method for N-aryl substituted indenoindole

A nickel-based catalyst was employed for the first time in the crossing-coupling of indenoindoles with bromo-/iodoarenes. A simple and practical method was provided for the synthesis of N-aryl substituted indenoindole and the mechanism of this reaction was discussed.

The catalytic behavior of heterocenes activated by TIBA and MMAO under a low Al/Zr ratios in 1-octene polymerization

A series of SiMe2-bridged ansa-zirconocenes LZrCl2 derived from heterocyclic ligands such as cyclopenta[1,2-b:4,3-b’]dithiophene, 5,6-dihydroindeno[2,1-b]indole and 5,10-dihydroindeno[1,2-b]indole, called “heterocenes” were synthesized and characterized by NMR spectroscopy and by X-ray diffraction analysis. These complexes were activated by triisobutylaluminium (TIBA) at AlTIBA/Zr ratio ～75 and then by MMАO-12 at AlMAO/Zr ratio ～10, and were studied in the polymerization of 1-octene in the absence or presence of molecular hydrogen. In the absence of molecular hydrogen, derivatives of cyclopenta[1,2-b:4,3-b’]dithiophene and dihydroindeno[2,1-b]indole demonstrated high catalytic activity, while dihydroindeno[1,2-b]indole complexes catalyzed slow polymerization with the formation of ultrahigh molecular weight poly(1-octene)s. In the presence of molecular hydrogen, derivatives of dihydroindeno[1,2-b]indole showed an order of magnitude increase in the catalytic activity. β-Hydride elimination, β-hexyl elimination and Zr-Al transfer were detected as the main chain release mechanisms depending on the nature of the ligand used. A novel chain termination with selective formation of –C(Me)=CHCH2– unsaturations was detected. It was found that heterocenes maintained a high catalytic activity up to 120 °C. Due to their high thermal stability and good hydrogen response, heterocenes are promising catalysts for the oligomerization and hydrooligomerization of α-olefins in the production of high-quality motor oil base stocks.

Synthesizing method of N-aryl-substituted indeno [1,2-b] indole compound

The invention discloses a synthesizing method of an N-aryl-substituted indeno [1,2-b] indole compound. The synthesizing method specifically comprises the following steps of (1) in an organic solvent, enabling a compound II and organic alkaline to react and generate a compound III; (2) in the organic solvent, under the existence of a catalyst, enabling the compound III and a compound IV to react, so as to obtain an N-aryl-substituted indeno [1,2-b] indole compound I, wherein the structure formulas of the compound I, compound II, compound IIII and compound IV are respectively shown in the descriptions. The synthesizing method has the advantages that the reaction conditions are mild, the raw materials are simple, the obtaining is easy, the primer suitability is high, and the product yield rate is high.

Metallocenes and catalysts for olefin-polymerisation

A class of metallocenes of formula (I): (ZR1m)n(Cp)(A)rMLpL′q (I) wherein ZR1m) is a divalent group bridging Cp and A, Cp is a heterocyclic cyclopentadienyl group of formula (II) or (II′), wherein one of X or Y is a single bond, the other being an heteroatom; R2 and R3 are hydrogen, halogen or a hydrocarbon radical, optionally containing heteroatoms; R4 is a halogen or an hydrocarbon radical, optionally containing heteroatoms; the group A is a cyclopentadienyl derivative or is equal to Cp; M is Ti, Zr or Hf; m is 1 or 2; n ranges from 0 to 4; r is 0 or 1; p and q range from 0 to 3; and a ranges from 0 to 4. Moreover, are disclosed catalyst systems containing these metallocenes, useful in the polymerization of olefins.

ON THE REDUCTION OF vic-DIOXOPYRROLOINDOLES WITH LITHIUM ALUMINUM HYDRIDE

Dioxopyrrolindoles and their structural analogues, diazapropellanediones were reduced by lithium aluminum hydride affording their hydrogenated derivatives (1) and (2), each of them representing a mixture of diastereomers.Under equal reaction