6results about How to "Few reaction steps" patented technology

The application discloses a method for synthesizing tervalent tetraaryl iron porphyrin from pyrrole, aromatic aldehyde and ferrous salt, which comprises the following steps: adding anhydrous aluminum chloride, aromatic aldehyde, pyrrole and ferrous salt into DMF under stirring, and then heating and refluxing the reaction mixture for 0.5 hours under nitrogen; removing the nitrogen and continuing to heat the reaction mixture for a certain time; stopping the reaction; cooling the reaction mixture; and placing the reaction mixture at 273K overnight; and finally filtering the reaction mixture to obtain the iron porphyrin.

This invention provides a method for preparing 4,1-disubstituted pyrrolo[1,2-a]quinoxaline-1-yl ketone derivatives, belonging to the field of organic synthesis technology. This invention uses 2-(1H-pyrrolo-1-yl)aniline compounds and α-carbonyl acids as reactants, employing only ammonium persulfate as an oxidant. Under metal-free catalysis, a one-pot tandem reaction is carried out to simultaneously complete the cyclization of the pyrrolo[1,2-a]quinoxaline nucleus and the C-1 acylation modification. The substituents at the 4- and 1-positions of the product can be flexibly controlled by changing the α-carbonyl acid with different structures. This method requires no pre-modified substrate, eliminates the need for metal catalysts, avoids the risk of metal residue, and features simplified steps and high functional group compatibility, providing a new green and low-cost route for the synthesis of polysubstituted pyrrolo[1,2-a]quinoxaline ketone derivatives.

The application discloses a preparation method of a trans-7H-pyrrolo[2,3-d]pyrimidine compound, and the full name of the trans-7H-pyrrolo[2,3-d]pyrimidine compound is trans-N-methyl-4-(methyl-7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)cyclohexylmethanesulfonamide maleate, which is prepared from trans-4-[(tert-butoxycarbonyl)amino]cyclohexane carboxylic acid and 4-chloro-7H-pyrrolo[2,3-d]pyrimidine as starting materials through reduction, chlorination, substitution, oxidation, methylation, condensation and salt formation reactions. The preparation method has the advantages of few reaction steps, simple operation, low production cost, high production efficiency, high yield, high product purity and suitability for scale-up production.

This invention discloses a highly efficient oxygen removal reagent and its application in the deoxygenation reconstruction of carbon resource molecular skeletons, comprising a pivot reagent, a phosphine reagent, an azo reagent, a reducing agent, an acid reagent, a base reagent, a photosensitizer, and an organic solvent; wherein, X in the pivot reagent includes a hydrazine group or a sulfone group; PG is a protecting group; LG is a leaving group; by using natural oxygen-containing functional groups such as alcohols, aldehydes, and ketones as direct coupling precursors, an integrated in-situ activation-deoxygenation coupling process is achieved, significantly reducing reaction steps.

This invention relates to the field of new energy materials technology, and discloses a self-assembled molecular material and its applications. The self-assembled molecular material has the structure shown in Formula I: Formula I; wherein A is a substituted or unsubstituted carbazole group, B is a substituted or unsubstituted fluorene group, A' is a substituted or unsubstituted carbazole group or a substituted or unsubstituted triphenylamine group; and D is an anchoring group. This self-assembled molecular material simultaneously includes a fluorene structure, a carbazole structure, and multiple anchoring groups. The synergistic interaction of these groups and structures significantly enhances the thermal stability and film-forming properties of the self-assembled molecular material, resulting in solar cells containing this self-assembled molecular material exhibiting excellent photothermal conversion efficiency and stability.

This invention belongs to the technical field of flame-retardant polyether polyols and their preparation, specifically relating to a method for preparing a highly flame-retardant phosphazene-based polyether polyol. The method involves a nucleophilic substitution reaction between hexachlorocyclotriphosphazene and water in the presence of an acid-binding agent, generating a polyhydroxyl-containing phosphazene derivative as an initiator. Using this initiator as the core, other small-molecule polyols are combined, and propylene oxide undergoes ring-opening polymerization under the action of a catalyst to form a polyether polyol with a "phosphazene ring-polyether chain" structure. Due to the presence of the phosphazene ring in the molecule, this product possesses both excellent flame-retardant properties and good reactivity, and can be directly used to synthesize flame-retardant rigid polyurethane foams, elastomers, and other materials, solving the problem of requiring additional flame retardants in traditional polyether polyols. This invention features highly controllable processes, readily available raw materials, and a product with excellent comprehensive performance, making it highly valuable for industrial applications.