67104-71-6

Upstream product

• 6630-33-7 ortho-bromobenzaldehyde 
• 4294-57-9 para-methylphenylmagnesium bromide 
• 67104-64-7 2-bromophenyl(4-methylphenyl)methanone 
• 59142-66-4 (2-bromophenyl)(p-tolyl)methanol 
• 5720-05-8 4-methylphenylboronic acid 
• 3433-80-5 1-Bromo-2-bromomethyl-benzene 
• 15106-88-4 di(p-tolyl)zinc 
• 1352918-95-6 N-((2-bromobenzyl)oxy)-N-methylacetamide 
• 108-88-3 toluene 
• 589-15-1 1-bromomethyl-4-bromobenzene 
• 98-80-6 phenylboronic acid 
• 106-38-7 para-bromotoluene 
• 158918-49-1 N’-(2-bromobenzylidene)-4-methylbenzenesulfonohydrazide 
• 624-31-7 4-tolyl iodide 

Downstream Products

• 67104-65-8 (2-Dichlorarsinophenyl)-(4-methylphenyl)-methan 
• 1399814-12-0 4’-methoxy-2-(4-methylbenzyl)-1,1’-biphenyl 
• 1399813-74-1 2-{[2-(4-methylbenzyl)]phenyl}propene 
• 47135-83-1 6-(4′-methylphenyl)phenanthridine 
• 2523-39-9 3-methylfluorene 
• 620-83-7 1-methyl-4-(phenylmethyl)benzene 
• 5398-16-3 2-(4-methyl-benzyl)-benzoic acid 

Relevant academic research and scientific papers

Double C-H amination by consecutive SET oxidations

A new method for intramolecular C-H oxidative amination is based on a FeCl3-mediated oxidative reaction of anilines with activated sp3 C-H bonds. The amino group plays multiple roles in the reaction cascade: (1) as the activating group in single-electron-transfer (SET) oxidation process, (2) as a directing group in benzylic/allylic C-H activation at a remote position, and (3) internal nucleophile trapping reactive intermediates formed from the C-H activation steps. These multielectron oxidation reactions proceed with catalytic amounts of Fe(iii) and inexpensive reagents.

Coupling N-H Deprotonation, C-H Activation, and Oxidation: Metal-Free C(sp3)-H Aminations with Unprotected Anilines

An intramolecular oxidative C(sp3)-H amination from unprotected anilines and C(sp3)-H bonds readily occurs under mild conditions using t-BuOK, molecular oxygen and N,N-dimethylformamide (DMF). Success of this process, which requires mildly acidic N-H bonds and an activated C(sp3)-H bond (BDE 85 kcal/mol), stems from synergy between basic, radical, and oxidizing species working together to promote a coordinated sequence of deprotonation: H atom transfer and oxidation that forges a new C-N bond. This process is applicable for the synthesis of a wide variety of N-heterocycles, ranging from small molecules to extended aromatics without the need for transition metals or strong oxidants. Computational results reveal the mechanistic details and energy landscape for the sequence of individual steps that comprise this reaction cascade. The importance of base in this process stems from the much greater acidity of transition state and product for the 2c,3e C-N bond formation relative to the reactant. In this scenario, selective deprotonation provides the driving force for the process.

Multi-component one-pot reaction of aromatic carbonyl compounds, tosylhydrazide, and arylboronic acids

In this paper, we developed a new method using 4-bromoacetophenone as the starting material, with tosylhydrazide and two arylboronic acids using Barluenga and Suzuki couplings in a four-component one-pot reaction to afford the target product 4-benzyl-1,1-biphenyls. This system that we have developed enables the use of easily accessible starting materials and can be employed on a wide variety of substrates with good functional group tolerance. In particular, this protocol can be applied to the synthesis of 4-(1-([1,1-biphenyl]-4-yl)ethyl)pyridine derivatives, a class of potential analogs of CPY17 inhibitors of prostate cancer.

Efficient palladium-catalyzed C(sp2)-H activation towards the synthesis of fluorenes

A facile protocol for the synthesis of fluorene derivatives has been developed through palladium-catalyzed cyclization of 2′-halo-diarylmethanes via activation of arylic C-H bonds. The reactions occurred smoothly and allowed both electron-rich and electron-deficient substrates to convert into their corresponding fluorenes in good to excellent yields. Studies revealed that this Pd-catalyzed cyclization was also available for the substrates of 2′-chloro-diarylmethanes and no catalyst poisoning occurred for 2′-iodo-diphenylmethane.

Bismuth-catalyzed synthesis of anthracenes via cycloisomerization of o-alkynyldiarylmethane

In this study, anthracenes were efficiently synthesized from o-alkynyldiarylmethane using a novel method that exploits the synergistic effect between Bi(OTf)3 as the catalyst, and trifluoroacetic acid (TFA). Through this reaction, we achieved the rapid and efficient synthesis of anthracenes bearing various functional groups under mild conditions.

Iron phosphine catalyzed cross-coupling of tetraorganoborates and related group 13 nucleophiles with alkyl halides

Iron phosphine complexes prove to be good precatalysts for the cross-coupling of alkyl, benzyl, and allyl halides with not only aryl triorganoborate salts but also related aluminum-, gallium-, indium-, and thallium-based nucleophiles. Mechanistic studies revealed that while Fe(I) can be accessed on catalytically relevant time scales, lower average oxidation states are not formed fast enough to be relevant to catalysis. EPR spectroscopic studies reveal the presence of bis(diphosphine)iron(I) complexes in representative catalytic reactions and related processes with a range of group 13 nucleophiles. Isolated examples were studied by M?ssbauer spectroscopy and single-crystal X-ray structural analysis, while the electronic structure was probed by dispersion-corrected B3LYP DFT calculations. An EPR study on an iron system with a bulky diphosphine ligand revealed the presence of an S = 1/2 species consistent with the formation of a mono(diphosphine)iron(I) species with inequivalent phosphine donor environments. DFT analysis of model complexes allowed us to rule out a T-shaped Fe(I) structure, as this is predicted to be high spin.

Efficient synthesis of substituted styrenes and biaryls (or heteroaryls) with regioselective reactions of ortho -, meta -, and para-bromobenzyl bromide

Regio- and stereoselective reactions of ortho-, meta-, and para-bromobenzyl bromide under Stille and (or) Suzuki cross-coupling reactions are described that provided substituted styrene monomers and biaryls in two steps. By controlling the experimental conditions, the first coupling provided access to allylarene or diarylmethane intermediates, and the second reaction led to the desired styrenes and biaryls, substituted by a spacer arm in the ortho, meta or para position depending on the starting material. Georg Thieme Verlag Stuttgart · New York.

Exploiting boron-zinc transmetallation for the arylation of benzyl halides: What are the reactive species?

One step Beyond: The transmetallation reactions of ArB(OH)2 and Ar3B3O3 with Et2Zn are far more complicated than previously supposed, with solvent-dependent equilibria between ArB(OY)2 at one side and [RZn(solv)3][BR4] at the other (see picture). While the role of the highly reactive organozinc cation has not been implicated before, its importance for the activation of an otherwise sluggish class of electrophiles is shown. Copyright

Friedel-crafts benzylation of activated and deactivated arenes

NO going back makes possible facile Friedel-Crafts benzylations with moderate reaction temperatures, simple reaction workups, and improved substrate scope for the formation of synthetically important diarylmethanes (see scheme). Upon complexation with BF3?OEt2, hydroxamates serve as reversible leaving groups that stabilize highly reactive carbocations. Even deactivated arenes and electron-deficient benzylhydroxamates react cleanly under these conditions.

Iron-catalysed Negishi coupling of benzyl halides and phosphates

Iron-based catalysts containing either 1,2-bis(diphenylphosphino)benzene or 1,3-bis(diphenylphosphino)propane give excellent activity and good selectivity in the Negishi coupling of aryl zinc reagents with a range of benzyl halides and phosphates. The Roy