263397-82-6

Upstream product

• 23058-81-3 1-bromo-3,5-bis(propan-2-yl)benzene 
• 24544-04-5 2,6-diisopropylbenzenamine 
• 80058-84-0 4-bromo-2,6-diisopropylaniline 
• 7647-01-0 hydrogenchloride 
• 1025719-26-9 1,3-diisopropyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborlan-2-yl)benzene 
• 99-62-7 1,3-diisopropylbenzene 
• 5419-55-6 Triisopropyl borate 
• 688-74-4 boric acid tributyl ester 
• 121-43-7 Trimethyl borate 
• 7732-18-5 water 

Downstream Products

• 853993-38-1 1-(3,5-diisopropyl-phenyl)-anthraquinone 
• 1231646-17-5 2-bromo-4-(3,5-diisopropylphenyl)-5-methylindene 
• 1231646-23-3 dimethylbis(2-(2-(5-methylfuryl))-4-(3,5-diisopropylphenyl)-5-methylindenyl)silane 
• 1231646-15-3 4-(3,5-diisopropylphenyl)-5-methylindene 
• 1538589-63-7 3,5-diiodo-N-[2,6-bis(3,5-diisopropylphenyl)phenyl]salicylaldimine 
• 627810-65-5 trifluoro-methanesulfonic acid 1-(3,5-diisopropyl-phenyl)-anthracen-9-yl ester 
• 627810-61-1 1-(3,5-diisopropyl-phenyl)-10H-anthracen-9-one 

Relevant academic research and scientific papers

Introducing NacNac-Like Bis(4,6-isopropylbenzoxazol-2-yl)methanide in s-Block Metal Coordination

Within this work, the field of bulky methanides in metal coordination is exceeded by the synthesis of the versatile and promising bis(4,6-isopropylbenzoxazol-2-yl)methane (7) ligand platform. As an enhancement in this class of ligands, isopropyl (iPr) substituents as steric-demanding groups have been successfully introduced in proximity to the coordination pocket, mimicking the shielding abilities of the ubiquitous NacNac ligand scaffold to improve the steric protection of a coordinated s-block metal cation. A percent buried volume (% Vbur) calculation as well as an electronic structure analysis shades light onto the shielding and electronic abilities of the ligand in comparison to other selected methanides and diketiminates. Upon deprotonation with a variety of different group 1 and 2 metalation agents, a row of novel s-block metal complexes of the parent deprotonated monoanionic ligand 7 was obtained and structurally, as well as spectroscopically, characterized. In particular, in this context, the alkali-metal precursor complexes [Li(THF)2{(4,6-iPr-NCOC6H2)2CH}] (8) and [K{μ-(4,6-iPr-NCOC6H2)2CH}]∞ (9) as well as the alkaline-earth-metal compounds [MgCl(THF)2{(4,6-iPr-NCOC6H2)2CH}] (10) and [M(THF)n{(4,6-iPr-NCOC6H2)2CH}2] [M = Mg, n = 0 (11); M = Ca, n = 1 (12); M = Sr, n = 1 (13); M = Ba, n = 1 (14)] were successfully synthesized. Especially, the latter four exhibit interesting trends in the solid state as well as in solution within the metal series.

Monofunctional hyperbranched ethylene oligomers

The neutral κ2N,O-salicylaldiminato Ni(II) complexes [κ2N,O-{(2,6-(3′,5′-R2C 6H3)2C6H3-Ni -C(H)-(3,5-I2-2-O-C6H2)}]NiCH 3(pyridine)] (1a-pyr, R = Me; 1b-pyr, R = Et; 1c-pyr, R = iPr) convert ethylene to hyperbranched low-molecular-weight oligomers (Mn ca. 1000 g mol-1) with high productivities. While all three catalysts are capable of generating hyperbranched structures, branching densities decrease significantly with the nature of the remote substituent along Me > Et > iPr and oligomer molecular weights increase. Consequently, only 1a-pyr forms hyperbranched structures over a wide range of reaction conditions (ethylene pressure 5-30 atm and 20-70 C). An in situ catalyst system achieves similar activities and identical highly branched oligomer microstructures, eliminating the bottleneck given by the preparation and isolation of Ni-Me catalyst precursor species. Selective introduction of one primary carboxylic acid ester functional group per highly branched oligoethylene molecule was achieved by isomerizing ethoxycarbonylation and alternatively cross metathesis with ethyl acrylate followed by hydrogenation. The latter approach results in complete functionalization and no essential loss of branched oligomer material and molecular weight, as the reacting double bonds are close to a chain end. Reduction yielded a monoalcohol-functionalized oligomer. Introduction of one reactive epoxide group per branched oligomer occurs completely and selectively under mild conditions. All reaction steps involved in oligomerization and monofunctionalization are efficient and readily scalable.

METALLOCENE COMPLEX AND METHOD FOR POLYMERIZING OLEFIN

A metallocene complex by which high uptake efficiency of ethylene and/or α-olefin can be obtained compared with the conventional metallocene catalyst, and rubber component having high molecular weight can be polymerized, and polymerization method of olefi

Synthesis, properties, and structure of tethered molybdenum alkylidenes

A new class of molybdenum alkylidenes has been prepared where the alkylidene is tethered to an imido ancillary ligand. The amine required for the synthesis is accessible in 38% yield in five steps from 1,3-diisopropylbenzene. The amine is then installed to generate the tethered alkylidene bis(triflate) complex, which was structurally characterized as its DME adduct. The Inflates are replaced by hexafluoro-terfbutoxide groups using the thallium salt of the alkoxide, and the bis(alkoxide) was characterized as its quinuclidine adduct. For comparison, an alkylidene bis(alkoxide) was prepared without the tether and having a formula similar to that of the tethered system. The structures from X-ray diffraction and NMR spectroscopy of the two complexes with and without the tether but with similar formulas are compared. The tether has the apparent effect, judging from JCH couplings in the alkylidene and angles in the solidstate structure, of reducing the strength of the a-agostic interaction. Four complexes were structurally characterized during this study: Mo[=N-2,4-Pr2iC6H2-2-CH 2CH2CMe2CH=](DME)(OTf)2, Mo(OBf)2, Mo(OBuF6t)2(quin)-[=N-2,4- Pr2iC6H2-2-CH2CH 2CMe2CH=], Mo[N(2,4-Pr2i-6-MeC 6H2)]2(neopentyl)2, and Mo(OBu F6t)2(quin)-[N(2,4-Pr2 i-6-MeC6H2)] [=C(H)But].

Syntheses of sterically hindered pyridinium phenoxides as model compounds in nonlinear optics

Noncentrosymmetric molecules with a π-conjugated system and, among them, push-pull molecules such as pyridinium phenoxide, are a promising new class of materials for applications in optoelectronics due to their nonlinear optical (NLO) properties. Modelling studies have indicated that an increase in the twist angle between the two aromatic rings leads to an enhancement of the NLO properties. In order to confirm this feature experimentally, it was necessary to prepare a series of new hindered pyridinium phenoxides. Their efficient syntheses by Suzuki cross-coupling reactions are described herein. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.