18869-47-1Relevant academic research and scientific papers
Method for synthesizing tyrosine framework type periodic mesoporous organosilicas materials
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Paragraph 0024, (2017/08/29)
The invention relates to a method for preparing tyrosine framework type periodic mesoporous organosilicas materials. The method for synthesizing the tyrosine framework type periodic mesoporous organosilicas materials includes esterifying tyrosine in methanol by the aid of thionyl chloride; carrying out acrylation on the tyrosine by the aid of hydrazine hydrate and carrying out reaction on the tyrosine and isocyanic acid propyltriethoxysilane to obtain tyrosine organosilicas precursors; hydrolyzing the tyrosine organosilicas precursors and surfactants under acidic conditions to form PMO (periodic mesoporous organosilicas) materials; removing the surfactants from the PMO materials by means of extraction to ultimately form PMO materials with specific morphological structures. The tyrosine is used as a substrate. The methanol is used as a solvent. The method has the advantages synthesis reaction raw materials are simple and are easily available, synthesis operation is simple and convenient and is easy to implement, and the method is high in yield and low in energy consumption and is safe and inexpensive; the tyrosine framework type periodic mesoporous organosilicas materials prepared by the aid of the method have important application prospects in the fields of biosensors, catalyst carriers, adsorbents, sustained-release medicine capsules, chromatographic separation and the like.
BISAMIDE COMPOUNDS AS ALLOSTERIC EFFECTORS FOR REDUCING THE OXYGEN-BINDING AFFINITY OF HEMOGLOBIN
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Paragraph 0239-0240, (2016/12/01)
This invention relates to compounds of Formula (I) and pharmaceutically acceptable salts thereof, which are allosteric effectors that reduce the oxygen-binding affinity of hemoglobin, which can enhance the efficacy of radiation therapy for cancer and which are useful for the treatment of ischemia and other conditions.
BISAMIDE COMPOUNDS AS ALLOSTERIC EFFECTORS FOR REDUCING THE OXYGEN-BINDING AFFINITY OF HEMOGLOBIN
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Page/Page column 43, (2015/07/23)
This invention relates to compounds of Formula (I) and pharmaceutically acceptable salts thereof, which are allosteric effectors that reduce the oxygen-binding affinity of hemoglobin, which can enhance the efficacy of radiation therapy for cancer and which are useful for the treatment of ischemia and other conditions.
Palladium-catalyzed oxalyl amide assisted direct ortho-alkynylation of arylalkylamine derivatives at δ and ε positions
Guan, Mingyu,Chen, Changpeng,Zhang, Jingyu,Zeng, Runsheng,Zhao, Yingsheng
supporting information, p. 12103 - 12106 (2015/07/28)
Palladium-catalyzed oxalyl amide directed ortho-alkynylation of arylalkylamine derivatives is reported for the first time. A wide variety of β-arylethamine and γ-arylpropamine derivatives are compatible with this protocol. This method provides a general means to synthesize substituted alkynylarylalkylamine derivatives, highlighting the ability of oxalyl amide in promoting C-H functionalization at unique δ and ε positions.
Synthesis of d,l-amino acid derivatives bearing a thiol at the β-position and their enzymatic optical resolution
Morishita, Yasuhito,Kaino, Tomoka,Okamoto, Ryo,Izumi, Masayuki,Kajihara, Yasuhiro
, p. 6565 - 6568 (2015/11/09)
Amino acids bearing a thiol group at the β-position are useful for native chemical ligation. Phenylalanine and tyrosine derivatives bearing a thiol group at the β-position were synthesized. Racemic phenylalanine and tyrosine were selected as starting materials and were introduced a bromo atom at the β-position by photoreaction. Subsequent substitution reaction of the bromo atom with p-methoxybenzylmercaptan yielded the corresponding amino acids bearing a thiol group at the β-position. Enzymatic optical resolution using l-aminoacylase and subsequent chemical conversion gave the corresponding optically pure l- and d-phenylalanine and tyrosine derivatives bearing a thiol group at the β-position.
A small molecule peptidomimetic of spider silk and webs
Maji, Krishnendu,Sarkar, Rajib,Bera, Santu,Haldar, Debasish
supporting information, p. 12749 - 12752 (2015/05/20)
A peptidomimetic compound containing leucine, tyrosine and malonic acid self-assembles through various noncovalent interactions to form spider silk-like fibers at ambient temperature. From the high-density liquid, a liquid-solid phase transition is initiated at 20 °C and solidification occurs upon contact with air. The fiber has comprehensive mechanical strength and optical properties similar to spider silk, and can be used to mimic a natural spider web. This journal is
Oxidation of oximes to nitrile oxides with hypervalent iodine reagents
Mendelsohn, Brian A.,Lee, Shelley,Kim, Simon,Teyssier, Florian,Aulakh, Virender S.,Ciufolini, Marco A.
supporting information; experimental part, p. 1539 - 1542 (2009/08/07)
Iodobenzene diacetate in MeOH containing a catalytic amount of TFA efficiently oxidizes aldoximes to nitrile oxides. The latter may be trapped in situ with olefins in a bimolecular or an intramolecular mode. The new method enables the execution of tandem oxidative dearomatization of phenols/intramolecular nitrile oxide cycloaddition sequences leading to useful synthetic intermediates.
Design, synthesis, and bioactivity of novel inhibitors of E. coli aspartate transcarbamoylase
Eldo, Joby,Heng, Sabrina,Kantrowitz, Evan R.
, p. 2086 - 2090 (2007/10/03)
A series of inhibitors of the aspartate transcarbamoylase, an enzyme involved in pyrimidine nucleotide biosynthesis, has been synthesized. These inhibitors are analogues of a highly potent inhibitor of this enzyme, N-phosphonacetyl-l-aspartate (PALA). Analogues have been synthesized with modifications at the α- and β-carboxylates as well as at the aspartate moiety. The ability of these compounds to inhibit the enzyme was evaluated. These studies, with functional group modified PALA derivatives, showed that amide groups can be a useful substitute of the carboxylate in order to reduce the charge on the molecule, and indicate that the relative position of the functional group in the β-position is more critical than the nature of the functional group. Some of the molecules synthesized here are potent inhibitors of the enzyme.
INTERMEDIATE COMPOUND WHICH IS USED FOR THE PREPARATION OF PIOGLITAZONE
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Example 1, (2008/06/13)
The present invention relates to a novel compound of formula (IV) which is an intermediate that can be used for the preparation of pioglitazone. It also relates to a method of obtaining the novel compound (IV) starting from the natural product L-tyrosine, in which the amino group is protected in the form of aromatic imino group, and a method of obtaining pioglitazone from the said intermediate.
EXOGENOUS MARKERS FOR OXIDATIVE STRESS
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Page/Page column 20-21, (2008/06/13)
The invention provides oxogenous markers, designed and synthesized for the measurement and characterization of oxidative/nitrosative stress levels, thus enable the identification of the type of reactive ROS/NRS involved, characterization of the damaged products and their formation kinetics, and thereby the identification of pathological conditions associated with oxidative/nitrosative stress, before appearing or at the stage of development.
