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Akademický článek

Crystal structures of two different multi-component crystals consisting of 1-(3,4-dimethoxybenzyl)-6,7-dimethoxyisoquinoline and fumaric acid

Autor: Hiroki Shibata, Aya Sakon, Noriyuki Takata, Hiroshi Takiyama

Publikováno v: Acta Crystallographica Section E: Crystallographic Communications, Vol 80, Iss 11, Pp 1146-1150 (2024)

Two different multi-component crystals consisting of papaverine [1-(3,4-dimethoxybenzyl)-6,7-dimethoxyisoquinoline, C20H21NO4] and fumaric acid [C4H4O4] were obtained. Single-crystal X-ray structure analysis revealed that one, C20H21NO4·1.5C4H4O4 (I

Externí odkaz: https://doaj.org/article/6ae9403101a74c46b9c38199b72cb340

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Akademický článek

Crystal structure of γ-methyl l-glutamate N-carboxy anhydride

Autor: Hitoshi Kanazawa, Aya Inada, Aya Sakon, Hidehiro Uekusa

Publikováno v: Acta Crystallographica Section E: Crystallographic Communications, Vol 71, Iss 1, Pp 48-50 (2015)

In the title compound, C7H9NO5, alternative name N-carboxy-l-glutamic anhydride γ-methyl ester, the oxazolidine ring is essentially planar with a maximum deviation of 0.020 (3) Å. In the crystal, molecules are linked by N—H...O hydrogen bonds bet

Externí odkaz: https://doaj.org/article/d5f322b88b4b41289308e4374e01cd52

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Cocrystal structure design for CH5134731 based on isomorphism

Autor: Noriyuki Takata, Koji Shiraki, Kazunori Kadota, Yuichi Tozuka, Takamitsu Ueto, Satoshi Tanida, Ryusuke Takano, Masaki Ishigai, Aya Sakon

Publikováno v: CrystEngComm. 20:362-369

We succeeded in forming a benzoic acid cocrystal of CH5134731 by focusing on the isomorphism shown by its solvates. As a result of evaluation, the benzoic acid cocrystal showed good solubility. This crystal engineering approach made it possible to re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::21aed36125dd59f00678c6286fc34748
https://doi.org/10.1039/c7ce01878a

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Mechanisms for Improved Hygroscopicity of L-Arginine Valproate Revealed by X-Ray Single Crystal Structure Analysis

Autor: Masataka Ito, Kaori Nambu, Aya Sakon, Etsuo Yonemochi, Hidehiro Uekusa, Katsuhide Terada, Shuji Noguchi

Publikováno v: Journal of Pharmaceutical Sciences. 106:859-865

Valproic acid is widely used as an antiepileptic agent. Valproic acid is in liquid phase while sodium valproate is in solid phase at room temperature. Sodium valproate is hard to manufacture because of its hygroscopic and deliquescent properties. To

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db1a6ecc06598d558b729d5cd58a4d55
https://doi.org/10.1016/j.xphs.2016.11.010

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Powder Structure Analysis of Vapochromic Quinolone Antibacterial Agent Crystals

Autor: Hidehiro Uekusa, Akiko Sekine, Aya Sakon

Publikováno v: Crystal Growth and Design. 16(8):4635-4645

Vapochromic materials, or those that show a reversible color change induced by vapor, are expected to serve as valuable sensors for volatile organic compounds or humidity. Crystals of pipemidic acid (PPA), a quinolone antibacterial agent, were found

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d1722409f5af1b71f4c630bcdbadf24
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100804448

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Mechanochromic Luminescence Based on Crystal-to-Crystal Transformation Mediated by a Transient Amorphous State

Autor: Hiroaki Aonuma, Takuma Okura, Tomohiro Seki, Shiki Yagai, Kohsuke Kawaguchi, Takashi Karatsu, Hajime Ito, Hidehiro Uekusa, Aya Sakon

Publikováno v: Chemistry of Materials. 28(1):234-241

Photoluminescent materials that exhibit tunable emission properties when subjected to mechanical stimuli have numerous potential applications. Although many organic/inorganic and organometallic compounds display this property, called mechanochromic l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed0705d3e99a624470523e51032cc608
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100804634

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Crystal-to-crystal photo-reversible polymerization mechanism of bis-thymine derivative

Autor: Kei Saito, Toru Asahi, Akihiro Udagawa, Priscilla Johnston, Hidehiro Uekusa, Aya Sakon, Ryosuke Toyoshima, Hideko Koshima

Publikováno v: RSC Advances. 6:107317-107322

Solid-state photo-polymerization in crystals can produce stereoregular polymer molecules in environmentally friendly solvent-free systems. The polymerization mechanism of bis-thymine derivatives, such as dimethyl-3,3′-(3,3′-(butane-1,4-diyl)bis(5

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60ce86a690fb2dc177a406405325c2ee
https://doi.org/10.1039/c6ra24229d

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Crystal structure of γ-methyl l-glutamate N-carboxy anhydride

Autor: Hidehiro Uekusa, Aya Sakon, Aya Inada, Hitoshi Kanazawa

Publikováno v: Acta Crystallographica Section E: Crystallographic Communications, Vol 71, Iss 1, Pp 48-50 (2015)
Acta Crystallographica Section E: Crystallographic Communications

Solid-state polymerization behavior of amino acid N-carboxy anhydrides is explained by the very preferable molecular arrangement for the reaction in the crystal structure.
In the title compound, C7H9NO5, alternative name N-carboxy-l-glutam

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ce20b4e1c4e657f0b9ad5d45bc79b2f
http://scripts.iucr.org/cgi-bin/paper?S2056989014026917

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