37 results about "Anomer" patented technology

The present invention relates to novel compounds according to the to the general formulas I, II, III, IV or V: wherein B is nucleoside base according to the structure: R is H, F, Cl, Br, I, C1-C4 alkyl (preferably CH3), -C=N, -C=C-Ra, X is H, C1-C4 alkyl (preferably, CH3), F, Cl, Br or I; Z is O or CH2, with the proviso that Z is CH2 and not O when the compound is according to general formula II, R<3 >is -C=C-H and R<2 >is H or a phosphate, diphosphate, triphosphate or phosphotriester group; R<1 >is H, an acyl group, a C1-C20 alkyl or an ether group; R<2 >is H, an acyl group, a C1-C20 alkyl or ether group, a phosphate, diphosphate, triphosphate, phosphodiester group or a group; Nu is a radical of a biologically active antiviral compound such that an amino group or hydroxyl group from said biologically active antiviral compound forms a phosphate, phosphoramidate, carbonate or urethane group with the adjacent moiety; R<8 >is H, or a C1-C20 alkyl or ether group, preferably a C1-C12 alkyl group; k is 0-12, preferably, 0-2; R<3 >is selected from a C1-C4 alkyl (preferably, CH3), -(CH2)n-C=C-Ra, R<3a >and R<3b >are independently selected from H, F, Cl, Br or I; R<4 >and R<5 >are independently selected from H, F, Cl, Br, I, OH, C1-C4 alkyl (preferably, CH3), -(CH2)n-C=C-Ra, with the proviso that R<4 >and R<5 >are not both H; Ra is H, F, Cl, Br, I, or -C1-C4 alkyl, preferably H or CH3; Y is H, F, Cl, Br, I or -C1-C4 alkyl, preferably H or CH3; and n is 0, 1, 2, 3, 4 or 5, preferably 0, 1 or 2; and their anomers, pharmaceutically acceptable salts, solvates, or polymorphs thereof.

The invention discloses a derivant for 2-deoxy-D-ribose, which is a compound as shown in the constitutional formula A on the right; R is selected from CH3(CH2)n-, CH3(CH2)n-Y-CH2-, X-CH2-, CH3(CH2)nCH(X)-, X2-CH-, CH3(CH2)nC(X)2- or CX3-; wherein, Y is selected from oxygen or sulfur; X is selected from fluorine, chlorine, bromine or iodine; n is equal to 0-5. The invention also provides the preparation method and the application of the compound with the general formula A. The compound with the general formula A includes Alpha anomer, Beta anomer and the mixture thereof.

The invention belongs to technical field of pharmacy and provides a method for preparing gemcitabine hydrochloride, which solves the problems that the industrialization cost is high and the total yield is low in the original preparation method of gemcitabine hydrochloride. The method comprises the steps of a. converting and extracting alpha anomer of a formula (II) from a formula (I); b. coupling the formula (II) and a formula (III); and c. obtaining the gemcitabine hydrochloride of a formula (V). The step a comprises the steps of (1) dissolving the compound with the formula (I) in an aprotic solvent at least containing R1OH and three-level organic amine salified by R1OH, heating and reflowing, then reducing temperature so as to increase the mole ratio of the Alpha anomer of the formula (II) in the Alpha anomer mixer of the formula (I); (2) extracting the compound with the formula (I), reducing the temperature under recrystallization liquid so as to recrystallize the extracted product to obtain a solid Alpha anomer of the formula (II) and recrystallization liquid of the formula (I).

A process for providing regiospecific and highly stereoselective synthesis of 9-β anomeric purine nucleoside analogs is described. The introduction of the sugar moiety on to 6-(azolyl)-substituted purine bases is performed so that highly stereoselective formation of the β anomers of only the 9 position regioisomers of the purine nucleoside analogs (either D or L enantiomers) is obtained. This regiospecific and stereoselective introduction of the sugar moiety allows the synthesis of nucleoside analogs, and in particular 2′-deoxy, 3′-deoxy, 2′-deoxy-2′-halo-arabino and 2′,3′-dideoxy-2′-halo-threo purine nucleoside analogs, in high yields without formation of the 7-positional regioisomers. Processes for providing novel 6-(azolyl)purines for the regiospecific and highly stereoselective synthesis of 9-β anomeric purine nucleoside analogs are described. The compounds are drugs or intermediates to drugs.

Provided is a process for preparing gemcitabine or a salt thereof, which preferably includes selectively precipitating the β-anomer of a 3′,5′-di-O-protected-N⁴-trimethylsilyl-2′-deoxy-2′,2′-difluorocytidine, removing the protecting groups to produce gemcitabine, and, optionally, converting the gemcitabine into a salt. Preferably, the 3′ and 5′ protecting groups are the same or different, and at least one of the 3′ and 5′ protecting groups is cinnamoyl, naphthoyl, naphthylmethylcarbonyl, 2-methylbenzylcarbonyl, 4-methylbenzylcarbonyl or 9-fluorenylmethyloxycarbonyl. Also provided are methods for enriching the β-anomer from an anomeric mixture of a 3′,5′-di-O-protected-N⁴-trimethylsilyl-2′-deoxy-2′,2′-difluorocytidine, e.g., a N⁴-trimethylsilyl-2′-deoxy-2′,2′-difluoro-cytidine-3′,5′-diester, e.g., 3′,5′-dicinnamoyl-N⁴-trimethylsilyl-2′-deoxy-2′,2′-difluorocytidine, using a slurrying process, and methods for converting the β-anomer-enriched product into gemcitabine or a salt thereof.

A process for isolating β-anomer enriched Gemcitabine hydrochloride by converting Gemcitabine base into Gemcitabine hydrochloride followed by its purification using solvents from the series of water soluble ethers like 1,4-dioxane or Monoglyme.

The present invention provides a method for purifying cellobiose which comprises the steps of (A) preparing a cellobiose-containing sugar solution; (B) increasing the rate of cellobiose present in the sugar solution relative to the total saccharides present therein up to at least 50% by mass; and (C) crystallizing cellobiose; and a method for preparing cellobiose having a high content of the α-anomer thereof which comprises the step of drying a cellobiose-containing sugar solution having a rate of cellobiose of at least 90% by mass relative to the total saccharides present therein while maintaining the sugar solution at a temperature ranging from 80 to 95° C. These methods of the present invention permit the economical preparation of cellobiose having considerably improved purity and recovery rate, without using any complicated process. Moreover, the present invention also permits the preparation of cellobiose highly soluble in water.

The present invention provides a highly stereoselective, simple and economical glycosylation process for preparation of β-anomer enriched 2¹-deoxy-2¹,2¹-D-ribofuranosyl difluoronucleosides of formula (II), and physiologically acceptable slats thereof, in particular, the β-enriched anomer of gemcitabine hydrochloride of formula (IIb) in purity of >99% is provided through utilization of a novel trichloroacetimidate of formula (I).

Provided is a process for preparing gemcitabine or a salt thereof, which preferably includes removing at least a substantial portion of the a anomer of a N-1-protected-2'-deoxy-2',2'-difluoro-cytidine-3',5'-diester from an anomeric mixture thereof; removing the 3'-ester, the 5'-ester and the N-protecting group; and optionally forming a salt. The 3'-ester and 5'-ester can be the same or different and at least one of the esters preferably is cinnamoyl, benzoyl, 1-naphthoyl, 1-naphthylmethylcarbonyl, 2-methylbenzylcarbonyl, 4-methylbenzylcarbonyl or 9-fluorenylmethyloxycarbonyl ester. Also provided are novel intermediates, including but not limited to 2-deoxy-2,2-difluoro-D-erythro-pentofuranos-1-ulose-3,5-diesters, and methods of producing such intermediates.

The present invention relates to a method for preparing capecitabine and a method for preparing a β-anomer-rich trialkyl carbonate compound used therein, and a highly pure capecitabine can be efficiently prepared with a high yield by the method of the present invention using the β-anomer-rich trialkyl carbonate compound as an intermediate.

The invention discloses a preparation method of high-anomer 4,4'-diaminodicyclohexylmethane. The content of anomer (PACM50) in the prepared product is 45-55 wt%. The preparation method comprises the following steps: performing a modification reaction on a raw material low-anomer 4,4'-diaminodicyclohexylmethane at 100-110 DEG C under the action of a catalyst and a modifier, raising the temperatureto 120-250 DEG C, and performing an isomerization reaction to prepare the high-anomer 4,4'-diaminodicyclohexylmethane. The method allows the PACM20 conversion rate to reach 99-100% and the PACM50 yield to reach 98-99%. The method has the advantages of realization of a high-temperature catalysis reaction under solvent-free and low-pressure nitrogen conditions without high-pressure nitrogen, simplicity in operation, safety, environmental protection, and suitableness for industrial production.

The invention provides a method for selectively removing carbohydrate compound anomer carbonyl by FeCl3.6H2O, which is shown as a formula I. The method can play an important role in carbohydrate medicine synthesis.

A method for the production of a-O-galactosyl ceramide precursor is demonstrated. The method involves the reaction of galactosyl iodide with a sphingosine derivative or phytosphingosine derivative in the presence of a quaternary ammonium iodide salt to prepare the a-O-galactosyl ceramide precursor in the a-anomer form. The a-O-galactosyl ceramide is then prepared by reaction with a suitable fatty acid or fatty acid derivative.

When manufacturing a sugar chain compound having an activating group, there was a problem with the ammonium carbonate method that is the conventional technology that during the process of introducing an amino group at the reducing terminal of the sugar chain, the unit sugar located at the reducing terminal of the sugar chain is subjected to ring-opening, thus causing a mixture of α and β anomers to be produced. The present invention provides a method for manufacturing a sugar chain compound having an activating group with high β selectivity using a compound having a sugar chain asparagine structure as the source material by cleaving the sugar chain from the sugar chain peptide so that the reducing terminal of the sugar chain and the nitrogen atom derived from the asparagine side chain will remain in a bound state, and introducing an activating group to said nitrogen atom while retaining not only the covalent bond between the reducing terminal of said sugar chain and said nitrogen atom but also the β configuration. A novel sugar chain compound which is a β anomer and has an activating group is also provided as a compound of the present invention.

A cosmetic composition, preferably an antiperspirant composition, in solid or soft-solid form has a continuous phase which contains a water-immiscible liquid carrier and also contains a structurant which is partially or fully esterified maltose of the formulae: which is the beta-anomer, and optionally which is the alpha-anomer; wherein each Z is independently hydrogen or an acyl group of the formula: where R denotes a hydrocarbyl group containing from 8 to 31 carbon atoms, with the proviso that not more than half of the Z groups are hydrogen, and the ratio of beta-anomer to alpha-anomer is from 65:35 to 100:0.

The present invention provides a chromatographic separating agent which exhibits excellent performances in separation of organic compounds, such as reducing sugars without formation of Schiff bases and anomer separation in analysis of saccharides. The chromatographic separating agent includes a porous substrate surface-modified with silane functional groups represented by the formula:

The invention discloses a method for treatment of sepsis. Specifically, multiple aspects of the invention relate to application of alpha-lactose in preparation of drugs for treatment of sepsis. Alpha-lactose is a disaccharide, and is an anomer. Research shows that subcutaneous injection of an alpha-lactose solution can significantly improve the 28d survival rate of a sepsis model mouse, can significantly improve release of inflammatory factors in a waterfall mode after sepsis and immune dysfunction caused by heavy immune cell apoptosis, and can alleviate liver injury induced by sepsis. Alpha-lactose is a pharmaceutic adjuvant included in the "Pharmacopoeia of the People's Republic of China", is widely used as a flavoring agent or filler, and has the advantages of low price, clear physicochemical properties and toxicity, easy dissolution in water, intravenous injection, and slight side effect. Under the current situation of high incidence and high mortality of sepsis patients, and lack of effective therapeutic drugs, alpha-lactose has enormous application value and prospects in preparation of drugs for treatment of sepsis.

A process for the preparation of cladribine of API grade is provided by direct coupling of O-protected 2-deoxy-ribofuranose with silylated 2-chloroadenine followed by deprotection of the resultant protected nucleoside in a separate step and then a purification step. Following the coupling, the desired N-9-glycosylated β-anomer of the nucleoside is directly isolated as a solid from the coupling reaction mixture by filtration in relatively high purity and yield, and it does not require purification.