38 results about "Acyl azide" patented technology

This invention includes a process for forming a thermoplastic vulcanizate comprising: (a) admixing a C-H insertion curing agent with at least one elastomeric phase polymer to form a first admixture; (b) admixing at least one non-elastomeric polyolefin with the first admixture to form a second admixture; and (c) heating the second admixture to a temperature at least the decomposition temperature of the curing agent to crosslink the elastomeric phase while mixing the admixture to an extent sufficient to result in the formation of a thermoplastic material, hereinafter referred to as a thermoplastic vulcanizate, and optionally including an additional step (d) of shaping the resulting thermoplastic vulcanizate, especially by heating and foaming or molding the TPV. The C-H insertion curing agent is preferably selected from alkyl and aryl azides (R-N3), acyl azides (R-C(O)N3), azidoformates (R-O-C(O)-N3), sulfonyl azides (R-SO2-N3), phosphoryl azides ((RO)2-(PO)-N3), phosphinic azides (R2-P(O)-N3) and silyl azides (R3-Si-N3), with poly(sulfonyl azide) most preferred. Additionally, the invention includes a thermoplastic vulcanizate comprising a blend of: (1) an elastomeric phase crosslinked using a C-H insertion curing agent dispersed in; (2) at least one non-elastomeric thermoplastic polyolefin. The invention also includes a foamable composition comprising (1) an elastomeric phase crosslinked using a C-H insertion curing agent dispersed in; (2) at least one non-elastomeric thermoplastic polyolefin; and (3) from about 0.1 to about 25 percent by weight based on the combined weight of components (1) and (2) of at least one foaming agent as well as a fabricated part, cable jacket, cable insulation, or foam comprising the thermoplastic vulcanizate or the invention or resulting from the process of the invention.

Cobalt (II) complexes of porphyrins are effective catalysts for intramolecular nitrene insertion of C—H bonds with arylsulfonyl azides. The cobalt-catalyzed process can proceed efficiently under mild and neutral conditions in low catalyst loading without the need of other reagents or additives, generating nitrogen gas as the only byproduct. Using the simple tetraphenylporphyrin (TPP) as the ligand, the cobalt-catalyzed intramolecular amidation can be applied to primary, secondary, and tertiary C—H bonds and suitable for a broad range of arylsulfonyl azides, leading to the syntheses of various benzosultam derivatives in excellent yields

The invention relates to a process for synthesizing a medicinal intermediate and particularly relates to a process for synthesizing an aminopropanol, which has the advantages of safe raw materials, high yield and mild reaction condition. According to the technical scheme of the invention, ring opening is carried out on 1,4-butyrolactone, serving as a raw material, under the action of hydrazine hydrate, the aqueous solution of sodium nitrite is added to generate acyl azide, and finally the rearranging is carried out to generate 3-aminopropanol.

The invention provides a rare earth metal luminous sensitizer, a rare earth complex thereof and synthesis and application thereof, and relates to the field of chemical synthesis. The sensitizer is prepared by four steps which are diazo reaction, acyl azide substitution, cycloaddition and hydrothermal decarboxylation. A luminous material of the rare earth complex is prepared by hydrothermal reaction and slow cooling. The mol ratio of the materials of Ln(NO3)3.5H2O, H2dcpt and NaOH is 1:1:1, H2O is used as a solvent, the temperature in the hydrothermal reaction is raised to be 180 DEG C, and the cooling speed is 1 DEG C/hour. Tests show that H2dcpt is a quite effective sensitizer, and can improve the fluorescence radiation of the rare earth metal. The rare earth complex can be used to produce luminescent devices.

The invention discloses a synthesis method of dimer(fatty acid)yl diisocyanate, which comprises the steps of: adding a methylbenzene solution of dimer(tall oil acid) and dimethylformamide into a reaction bulb, dropping a methylbenzene solution containing di(trichloromethyl) carbonic ester under the stirring at a temperature of 70-80 DEG C, reacting for 1h, filtering, evaporating to remove methylbenzene to obtain dimer(tall oil acid) acyl chloride, wherein the mol ratio of the dimer(tall oil acid) to the di(trichloromethyl) carbonic ester is 3:1-1.5; adding sodium azide and deionized water into the reaction bulb, dropping an acetone solution dissolved with the dimer(tall oil acid) acyl chloride under the stirring, adding 300ml of normal hexane, dimixing, washing a normal hexane layer by using cold water, drying by using anhydrous sodium sulfate to obtain an anhydrous sodium sulfate solution of dimer(tall oil acid) acyl azide, wherein the mol ratio of the dimer(tall oil acid) acyl chloride to the sodium azide is 1:2-2.2; and adding 300ml of normal hexane into the reaction bulb, dropping the normal hexane solution under the stirring at a temperature of 65-70 DEG C, and continuing to react for 30min after the dropping to obtain a target product.

The invention belongs to the technical field of pharmacy, relates to a polypeptide type medical compound, and in particular relates to a method for preparing buserelin by liquid-phase total synthesis.The buserelin is obtained by totally synthesizing tetrapeptide H-D-Ser(tBu)-Leu-Arg-Pro-NHEt and pentapeptide PGlu-His-Trp-Ser-Tyr-NHNH2 in an acyl azide coupling manner through combined protection by Boc and Fmoc. A C terminal tetrapeptide (H-D-Ser(tBu)-Leu-Arg-Pro-NHEt) of the buserelin is subjected to technical improvement; Boc-D-Ser(tBu)-OH is applied to liquid-phase synthesis of the buserelin for the first time; Boc removal is realized under an acidic condition and tert-butyl is not influenced; finally, Boc-Pro-OH, Boc-Arg(NO2)-OH, Boc-Leu-OH and Boc-D-Ser(tBu)-OH are used as basic reagents, so that the yield of the tetrapeptide is improved, and the cost is remarkably is reduced; reaction conditions and the cost are relatively proper. A result shows that the yield of synthesizing a tetrapeptide segment is easy to improve and the purification is facilitated by a manner of removing nitryl again after tetrapeptide synthesis is finished. The prepared buserelin can be used for clinically treating diseases including breast cancer, prostate cancer, endometriosis, infertility and the like, can be widely applied to the pharmaceuticals industry and has extremely high economic value andsocial value.

Cobalt(II) complex of P1 [Co(P1)], a new porphyrin that was designed on the basis of potential hydrogen bonding interactions in the metal-nitrene intermediate, is a highly active catalyst for olefin aziridination with azides. The [Co(P1)]-based system can be effectively employed for different combinations of aromatic olefins and arysulfonyl azides, synthesizing various sulfonylated aziridines in excellent yields. Besides its mild catalytic conditions, the Co-catalyzed aziridination process enjoys several attributes associated with the relatively low cost of cobalt and widely accessible arylsulfonyl azides. Furthermore, it generates stable dinitrogen as the only by-product.

The invention discloses N-3-arylamine-5-cyclopropane spirohydantoin and a preparation method and application thereof. The structural general formula of the N-3-arylamine substituent-5-cyclopropane spirohydantoin is shown in the specification, wherein R1 is phenyl, substituted phenyl and heterocyclic arene. The preparation method comprises the following steps of: performing a reaction between 1-carboxyl-2,2-dimethylcyclopropane ethyl carboxylate and ethyl chloroformate to generate 1-acyl azide-2,2-dimethylcyclopropane ethyl carboxylate under the effect of NaN3; performing Curtius rearrangement on the 1-acyl azide-2,2-dimethylcyclopropane ethyl carboxylate to generate corresponding isocyanate; performing a reaction between the isocyanate and hydrazine to obtain N'-arylamine substituent ureidocyclopropane; and generating N-3-arylamine substituent-5-cyclopropane spirohydantoin from the N'-arylamine substituent ureidocyclopropane. The preparation method disclosed by the invention is simple, has higher yield, and can be used for easily preparing the N-3-arylamine substituent-5-cyclopropane spirohydantoin.

The invention provides a preparation method of a chiral aryl cyclopropylamine derivative. The chiral aryl cyclopropylamine derivative is prepared by using benzene halide or benzene polyhalide as the initial raw material and subjecting the benzene halide or benzene polyhalide to Friedel-Crafts reaction, asymmetric reduction reaction, cyclization reaction, acylation reaction, hydrolysis reaction andCurtius rearrangement reaction, wherein the benzene halide or benzene polyhalide is preferably o-difluorobenzene, 2-chlorofluorobenzene or fluorobenzene. The preparation method has the advantages that carbonyl asymmetric reduction and a acylation reagent are used to build a cyclopropyl ester structure, and the use of chiral auxiliaries is avoided; the reaction route of the method is shortened ascompared with a reaction route in the prior art, and reaction yield is increased; acyl azide rearrangement is used to prepare primary amine, and the method is simple to operate, high in yield and suitable for large-scale industrial production.

The invention provides a hydroxyl compound terminal modified functional group and a method for modifying a hydroxyl compound by using the hydroxyl compound terminal modified functional group. Specifically, the modified functional group is a functional group molecule containing acyl azide or a functional group molecule containing isocyanate converted from the functional group molecule. The modified functional group reacts with terminal hydroxyl groups of polyethylene glycol (PEG), polylactic acid (PLA), polycaprolactone (PCL), polycarbonate (PC) or polyethylene glycol terephthalate (PET) compounds with various topological structures, and a terminal functionalized product containing stable carbamate connection is obtained. Compared with hydroxyl esterification or etherification modification which is mostly researched at present, the method disclosed by the invention is thorough in reaction, short in reaction time and high in functionalization rate, the functionalization rate is greater than 99%, and the obtained functionalized product is high in stability.

The invention discloses a thioester peptide synthesis method, which specifically comprises the following steps: dissolving polypeptide hydrazide in a hydrochloric acid-containing mixed solvent consisting of dimethyl sulfoxide and water, and reacting with isoamyl nitrite in an ice-salt bath to generate acyl azide peptide; adding excessive methyl thioglycolate, and then adding ammonium bicarbonate prepared in advance to adjust the acidity of the solution to be neutral, so that the acyl azide peptide is converted into peptide thioester; pre-cooled trifluoroacetic acid and diethyl ether are sequentially added into a reaction system, so that thioester peptide is crystallized and separated. The thioester peptide is prepared through the low-cost, simple and rapid operation process, and the problem that high-cost high performance liquid chromatography and time-consuming freeze drying operation are needed in traditional thioester peptide synthesis is solved.

The invention relates to the field of polypeptide synthesis, in particular to a solid-phase synthesis method of polypeptide. The method comprises the following steps: 1) activating hydroxyl resin into X-CO-O-Resin by an activating agent, wherein X is an activating group; 2) reacting the X-CO-O-Resin with NH2NH2 to synthesize NH2NH-CO-O-Resin, or reacting the X-CO-O-Resin with Fmoc-NHNH2 to synthesize Fmoc-NHNH-CO-O-Resin, and then removing Fmoc to obtain NH2NH-CO-O-Resin; 3) coupling the NH2NH-CO-O-Resin with amino acid or a peptide fragment according to a peptide sequence to obtain peptide hydrazide resin; 4) cracking the peptide hydrazide resin by a cracking reagent to obtain peptide hydrazide; 5) converting the peptide hydrazide into an acyl azide or hydrazine terminal structure which can be used for coupling in water, thereby preparing some polypeptides with special modification at carbon terminals. The method is particularly suitable for relin type polypeptide with ethylamino or semicarbazide at the carbon terminals. The relin polypeptide is prepared by a peptide hydrazide method, so that the cost can be greatly reduced, the operation steps are reduced, and the emission of waste water, waste gas and solid wastes is reduced. The synthesis process is safe and stable, has no adverse side reaction, and is suitable for industrial large-scale production.