7 results about "Iodobenzene" patented technology

The application provides a preparation method of N-tert-butyl-3-aminoindole derivatives, and the specific steps are as follows: 1) mixing compound IV, N-propyl-4-methylbenzenesulfonamide, copper sulfate pentahydrate, 1,10-phenanthroline, potassium carbonate and a first solvent, after reaction, post-treatment is performed to obtain compound II; 2) mixing tert-butylamine, triethylenediamine, di-tert-butyl dicarbonate, dichloromethane at room temperature, and after reaction for 12 hours, N,N-di-tert-butyl urea is obtained; further reaction of the N,N-di-tert-butyl urea is performed to obtain compound III; 3) mixing compound II, compound III, iodobenzene, a palladium catalyst, a biphosphine ligand, a base and a second solvent, and after reaction, the N-tert-butyl-3-aminoindole derivative with the structural formula of the application can be directly subjected to amination and ring reaction with iodobenzene in one-pot reaction.

The present application relates to the field of organic synthesis, specifically a method for synthesizing C3 fluorine alkyl substituted quinoxaline ketone derivatives from olefin derivatives and quinoxaline ketone derivatives under photocatalysis by using [bis(fluoroalkyl acetoxy)iodo] benzene as different fluorine alkyl sources. [Bis(fluoroalkyl acetoxy)iodo] benzene is used as a fluorine alkylating agent to generate fluorine alkyl radicals under photocatalysis, then the radicals add to olefin derivatives to obtain alkyl radicals, the alkyl radicals then add to quinoxaline ketone, and finally, after oxidation and deprotonation, C3 fluorine alkyl substituted quinoxaline ketone derivatives are obtained. The present application uses simple and stable [bis(fluoroalkyl acetoxy)iodo] benzene as a fluorine alkyl source to prepare C3 different fluorine alkyl substituted quinoxaline ketone derivatives from quinoxaline ketone and olefin derivatives in a three-component reaction without the action of photocatalysts. The synthesis method is simple and easy to operate, and different fluorine alkyl group substituted quinoxaline ketone derivatives can be quickly obtained.

The invention relates to the technical field of photoresist, in particular to photoresist for a capacitive touch sensor and a preparation process of the photoresist. The invention discloses a preparation process of photoresist for a capacitive touch sensor. The preparation process comprises the following steps: preparing a modified photoreaction agent; preparing modified polyimide resin powder; preparing silicon dioxide hollow carbon spheres and nano titanium dioxide hybrid particles; and preparing the photoresist. The preparation method comprises the following steps: firstly carrying out nitration reaction on 4-tert-butylphenol, then reducing nitryl into amino to obtain amino substituted 4-tert-butylphenol, protecting the amino by di-tert-butyl dicarbonate ester, then oxidizing iodobenzene into a high-valence iodine active intermediate by taking m-chloroperoxybenzoic acid as an oxidizing agent, and reacting with Boc-amino substituted 4-tert-butylphenol to obtain the high-valence iodine-substituted 4-tert-butylphenol. And finally, carrying out a replacement reaction with silver trifluoromethanesulfonate, carrying out deprotection to obtain a modified photoreaction agent, and carrying out a condensation polymerization reaction on the modified photoreaction agent, 4, 4 '-hexafluoroisopropyl phthalic anhydride and the like to generate a polyamic acid prepolymer, so that the photoetching resolution can be greatly improved.

This invention discloses a covalent organic polymer (COP) supported palladium nanoparticle catalyst with adjustable bipyridine content, its preparation method, and its application in C-C bond coupling reactions. This invention prepares a COP support with a gradient of bipyridine content by controlling the mixing ratio of monomers 5,5'-diamino-2,2'-bipyridine and benzidine with 1,3,5-tris(p-formylphenyl)benzene. Utilizing the strong coordination of the nitrogen atom in the bipyridine unit with palladium, efficient palladium loading and high dispersion are achieved, yielding a series of Pd@COP heterogeneous catalysts. This catalyst has a simple preparation process, low palladium loading, and controllable cost. It exhibits excellent catalytic activity and stability in the Sonogashira coupling reaction, with mild reaction conditions and high product yield, making it suitable for the efficient synthesis of diarylaceyne compounds. The bipyridine content of the catalyst support in this invention can be precisely controlled, and the palladium loading increases with the increase of bipyridine content. The palladium is uniformly dispersed on the surface of the support without obvious agglomeration. In the Sonogashira coupling reaction of iodobenzene and phenylacetylene, the separation yield can reach 93% under optimal conditions. The catalytic activity is not significantly affected by the palladium loading density, and it has good prospects for industrial application.

This invention discloses a method for preparing a diarylcarbazole material, relating to the field of organic light-emitting device technology. The method includes: obtaining intermediate A through a nitration reaction of 4-bromo-2-chloro-1-fluorobenzene; obtaining coupling intermediate B through a Suzuki coupling reaction of intermediate A and 1-naphthoboric acid; preparing intermediate C through a nitro cyclization reaction of intermediate B; coupling intermediate C with iodobenzene or iodobenzene derivative D to form intermediate E; preparing pinacol borate intermediate F using intermediate E; obtaining intermediate H through a Suzuki coupling reaction of intermediate F and o-bromoaniline or o-bromoaniline derivative G; cyclizing intermediate H under alkaline conditions to obtain intermediate I; and coupling intermediate I with a haloaryl derivative J to obtain the diarylcarbazole material. The preparation route provided by this invention has high reaction selectivity, produces a single product, has no obvious reaction defects, and avoids the problems of isomers in cyclization reactions and polybromination in bromination reactions.

This invention belongs to the field of molecular synthesis and materials technology, and discloses a method for preparing small molecule materials based on benzothiophene-benzodithiophene (DBDTT) and benzoselenophene-benzodiselenophene, as well as their applications. The method includes: using 1-chloro-2-iodobenzene or 1-chloro-2-bromobenzene and trimethylethynylsilane as raw materials, after a stalk coupling reaction, removing the TMS (trimethylsilyl group) with potassium hydrofluoric acid to obtain a key intermediate; using S8 or Se as a sulfur source or selenium source, and potassium carbonate as a base, a series of fused-ring thiophene / selenophene small molecule materials are synthesized through a cascade cyclization reaction. The substrates of this invention are simple to synthesize, the raw materials are inexpensive and readily available; no metals are involved; the reaction can be carried out under air conditions; the reaction efficiency is high, with three rings fused simultaneously in a single step; the yield is moderate, and even at a large scale (10 mmol), the yield can still reach 58%. Therefore, this method is suitable for industrial production.

This invention discloses an axially chiral bipyridine ligand, its preparation method, and its uses. The axially chiral bipyridine ligand has the structure of general formula (Ⅰ): the axially chiral bipyridine ligand contains a binaphthalene structure, wherein part A is selected from A-1, A-2, or A-3; part B is a hydrogen atom or is the same as part A. The complex catalyst formed in situ in the reaction system of the axially chiral bipyridine ligand and copper salt in this invention exhibits high catalytic activity, good to excellent enantioselectivity, and good substrate universality in the asymmetric ring-opening iodination, thioesterification, and hydrolysis of cyclic diaryliodonium salts to synthesize highly optically pure, diverse substituted 1,1'-bi-2-iodobenzene compounds, 1,1'-bi-2'-iodo-2-thioester compounds, and 1,1'-bi-2'-iodo-2-phenol compounds, respectively, showing great promise for industrial applications. This invention belongs to the field of asymmetric synthetic chemistry.