65414-78-0Relevant articles and documents
NOVEL PYRROLO-LACTONE AND PYRROLE COMPOUNDS INDUCING CELLULAR GLUTATHIONE RECOVERY EFFECT AGAINST REACTIVE OXYGEN SPECIES, AND METHOD FOR PREPARING THE SAME
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Paragraph 0102-0106; 0109; 0114; 0131; 0135, (2019/05/10)
The present invention provides: a novel pyrrolo-lactone compound, which can be used as an improved pain therapeutic agent containing various substituents by using glucose and ribose as reducing sugars and conducting a reaction with various kinds of natural and unnatural amino acids; and novel pyrrolo compounds produced during a process of manufacturing the same. The novel pyrrolo-lactone and pyrrole compounds are substances which can be used as improved pain therapeutic agent by having increased restoration ability of glutathione in living cells against reactive oxygen species.COPYRIGHT KIPO 2019
A polypeptide material aspartic acid tert-butyl β - α - methyl ester hydrochloride preparation method
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Paragraph 0023; 0024, (2019/01/08)
The invention discloses a polypeptide material aspartic acid tert-butyl β - α - methyl ester hydrochloride of the preparation method, is mainly composed of complex technology, cycle is long, the yield is low, the cost is high, the risk is high, does not meet the technical problems of production and the like. Preparation method of this invention comprises the following steps: 1st step, the aspartic acid suspended in dry tetrahydrofuran, in phosphorus oxychloride under the action of the aspartic acid in the preparation into the anhydride hydrochloride; 2nd step, aspartic acid anhydride hydrochloride suspended in methanol reaction to obtain the aspartic acid α - methyl ester hydrochloride, triethylamine for adjusting pH value so that the aspartic acid methyl α - separated out; 3rd step, aspartic acid methyl α - suspended in methylene chloride, access isobutene, concentrated sulfuric, sealed reaction to obtain the oil of aspartic acid tert-butyl methyl α - β -; 4th step, the oil of aspartic acid tert-butyl methyl α - β - dissolved in ethyl ether, dropping ethyl ether - hydrochloric acid gas, the final product is obtained α - β - tert-butyl aspartic acid methyl ester hydrochloride.
Design, synthesis, and molecular docking studies of N-(9,10-anthraquinone-2-carbonyl)amino acid derivatives as xanthine oxidase inhibitors
Zhang, Ting-Jian,Li, Song-Ye,Yuan, Wei-Yan,Zhang, Yi,Meng, Fan-Hao
, p. 893 - 901 (2018/03/21)
A series of N-(9,10-anthraquinone-2-carbonyl)amino acid derivatives (1a–j) was designed and synthesized as novel xanthine oxidase inhibitors. Among them, the L/D-phenylalanine derivatives (1d and 1i) and the L/D-tryptophan derivatives (1e and 1j) were effective with micromolar level potency. In particular, the L-phenylalanine derivative 1d (IC50?=?3.0?μm) and the D-phenylalanine derivative 1i (IC50?=?2.9?μm) presented the highest potency and were both more potent than the positive control allopurinol (IC50?=?8.1?μm). Preliminary SAR analysis pointed that an aromatic amino acid fragment, for example, phenylalanine or tryptophan, was essential for the inhibition; the D-amino acid derivative presented equal or greater potency compared to its L-enantiomer; and the 9,10-anthraquinone moiety was welcome for the inhibition. Molecular simulations provided rational binding models for compounds 1d and 1i in the xanthine oxidase active pocket. As a result, compounds 1d and 1i could be promising lead compounds for further investigation.
Parietic acid derivative and its synthesis and use
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Paragraph 0026-0028, (2017/04/03)
The invention relates to rheinic acid derivatives, and a synthetic method and applications thereof. The invention specifically discloses a compound with a general formula represented by formula (I), pharmaceutically acceptable salts and pharmaceutical compositions of the novel compound, and applications of the novel compound, the pharmaceutically acceptable salts and the pharmaceutical compositions in preparation of antitumor drugs, wherein R is used for representing L-amino acid amino C1-C6 alkyl, amino C2-C6 alkenyl, amino C3-C6 alkynyl, nitrogen-containing heterocyclic radical, or nitrogen-containing heterocyclic aryl group.
Synthesis of β-lactam peptidomimetics through Ugi MCR: First application of chiral Nβ-Fmoc amino alkyl isonitriles in MCRs
Vishwanatha,Narendra,Sureshbabu, Vommina V.
experimental part, p. 5620 - 5624 (2011/11/06)
Chiral Nβ-Fmoc amino alkyl isonitriles were employed in Ugi multi component reactions (Ugi 4C-3CR) to obtain functionalized β-lactam peptidomimetics with l-aspartic acid α-methyl ester/peptide ester and organic aldehydes. The reactions were carried out in MeOH. Thirteen Ugi products have been prepared in good to moderate yields with good diastereoselectivities.
Hexafluoroacetone as protection and activation reagent in amino acid and peptide chemistry regiospecific α-functionalization of aspartic acid
Burger, Klaus,Lange, Torsten,Rudolph, Martin
, p. 189 - 198 (2007/10/03)
A highly efficient method for regiospecific α-functionalization of aspartic acid is described. Key step is the synthesis of a N-protected and regioselectively α-carboxy-activated heterocyclic intermediate from aspartic acid and hexafluoroacetone. The new strategy offers i.a. a two step access to the sweetener Aspartame and to libraries of aspartame analogues.
IMMOBILIZED PENICILLINACYLASE: APPLICATION TO THE SYNTHESIS OF THE DIPEPTIDE ASPARTAME
Fuganti, Claudio,Grasselli, Piero,Casati, Paolo
, p. 3191 - 3194 (2007/10/02)
Immobilized penicillinacylase efficently catalyzes the conversion at pH 7.5 of N-phenacetyl aspartame (4) into aspartame (2) and phenylacetic acid.
Method of removing formyl groups from N-formyl-amino acid and N-formyl-peptide esters
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, (2008/06/13)
The masking N-formyl group of an N-formyl-amino acid ester or N-formyl-peptide ester is removed without major side reactions when the ester is reacted in an inert liquid medium with hydroxylamine of which at least 70% is present in the form of a salt with a strong acid, the remainder, if any, being present as the free base or the salt of a weak acid.