50829-59-9

Upstream product

• 106-41-2 4-bromo-phenol 
• 121-73-3 3-Nitrochlorobenzene 
• 106-37-6 1.4-dibromobenzene 
• 554-84-7 meta-nitrophenol 
• 620-55-3 1-nitro-3-phenoxybenzene 
• 107-06-2 1,2-dichloro-ethane 
• 860570-80-5 acetic acid-[2-(4-bromo-phenoxy)-4-nitro-anilide] 
• 204847-19-8 acetic acid-[2-(4-bromo-phenoxy)-anilide] 
• 2172-84-1 acetic acid-(4-nitro-2-phenoxy-anilide) 
• 143359-96-0 N-(2-phenoxyphenyl)acetamide 
• 99-65-0 meta-dinitrobenzene 
• 860736-35-2 2-(4-bromo-phenoxy)-4-nitro-aniline 

Relevant academic research and scientific papers

Preparation and characterization of Cu based on 5,5'-bistetrazole as a recyclable metal-organic framework and application in synthesis of diaryl ether by the Ullmann coupling reaction

Cu based on 5,5′-bistetrazole ([Cu2BT · 2H2O] n) as a recyclable metal-organic framework (MOF) heterogeneous catalyst was characterized by FT-IR, 13C NMR, XRD, SEM, EDX, BET, BJH, and ICP-AES analysis. The catalytic activity of the catalyst was probed through the Ullmann reaction for synthesis of diaryl ether derivatives from two component reactions of aromatic arylhalides and phenol derivatives in DMSO. Simple procedure, high yields, short reaction time, and environmentally benign methods are advantages of this protocol. The catalyst was readily separated by simple filtration and reusable without significant loss of its catalytic efficiency.

End-capping reagent containing crosslinkable group, modified polyimide precursor resin, photosensitive resin composition and application thereof

The invention provides an end-capping reagent containing a crosslinkable group, modified polyimide precursor resin, a photosensitive resin composition and application thereof. The cross-linkable group-containing end-capping reagent has the effect of a cross-linking agent during high-temperature curing, can be applied to polyimide precursor resin synthesis to obtain modified polyimide precursor resin with a cross-linking function. The odified polyimide precursor resin has a self-crosslinking function, and does not need an additional cross-linking agent; in the high-temperature curing process, the cross-linking group of the end-capping reagent can realize cross-linking among polyimide resin molecules to form a network cross-linked structure, so the overall heat resistance of the photoresistis improved, and meanwhile, the effects of improving the stripping resistance, reducing the amount of micromolecular volatile matters, improving the glass transition temperature of the photoresist andthe like are achieved. Meanwhile, the crosslinkable group reacts with phenolic hydroxyl groups in a polyimide main chain, so all or part of hydroxyl groups are consumed, the hygroscopicity of the material can be reduced, and the stability of a device can be improved.

Relative lability of nitro group in meta-substituted nitrobenzenes treated with 4-bromophenol in the presence of potassium carbonate

Relative lability of nitro group in meta-substituted nitrobenzenes treated with 4-bromophenol was studied by means of the method of concurrent reactions. A correlation was established between the relative rate of nitro group replacement and σm-

Process and novel intermediate for the preparation of 3,4'-diaminodiphenyl ether

In a process for the preparation of 3,4'-diaminodiphenyl ether, 3-nitrodiphenyl ether is reacted with a compound selected from Br2 and HNO3 to yield a compound of the formula: wherein, R is Br or NO2; and then carrying out, in any appropriate order, the steps of: (a) substituting any Br atom in the 4'-position with an NH2 group; (b) reducing any NO2 group to an NH2 group.