研究者氏名	石川紘輝

URL
所属	千葉大学
部署	西千葉地区事務部理工系総務課技術グループ
職名	技術職員
学位	博士（工学）(千葉大学)
科研費研究者番号	40938247
J-Global ID	202101021294561715

研究キーワード

有機化学 ,不斉合成 ,結晶工学

研究分野

ナノテク・材料 / 結晶工学 /
ナノテク・材料 / 有機合成化学 /
ナノテク・材料 / 構造有機化学、物理有機化学 /

論文

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Stereoselective Photodimerization of 3-Arylindenones in Solution and in the Solid State

Naohiro Uemura Hiroki Ishikawa Naoki Tamura Yasushi Yoshida Takashi Mino Yoshio Kasashima Masami Sakamoto

The Journal of Organic Chemistry 83(4) 2256-2262 2018年2月 [査読有り]

Photodimerization of 3-arylindenones in solution and in the solid state was examined. Irradiation of 3-arylindenones in benzene exclusively gave C-2-symmetric antiHH cyclobutane dimers in good yields. In contrast, photolysis in the solid state aff...

A Facile Synthesis of C2-Symmetric Macrocyclic Polyethers by Photodimerization of Covalently-linked Flavonoid Derivatives

Naohiro Uemura Hiroki Ishikawa Wataru Yoshida Satoshi Katabira Fumitoshi Yagishita Yasushi Yoshida Takashi Mino Yoshio Kasashima Masami Sakamoto

Chemistry Letters 47(2) 160-162 2018年2月 [査読有り]

C-2-Symmetric cyclic polyethers were conveniently provided by the photochemical dimerization of covalently-linked 2-chromonecarboxylic esters. Irradiation of polyethers possessing 2-chromonecarboxylate groups at both ends efficiently promoted intr...

Umpolung cyclization reaction of N-cinnamoylthioureas in the presence of DBU

Rei Saito Naohiro Uemura Hiroki Ishikawa Akina Magara Yasushi Yoshida Takashi Mino Yoshio Kasashima Masami Sakamoto

Organic & Biomolecular Chemistry 16(42) 7910-7919 2018年 [査読有り]

<p>The reaction of <italic>N</italic>-cinnamoylthioureas with DBU proceeded in an unprecedented “umpolung” cyclization fashion to give five-membered iminothiazolidinones and/or thiohydantoins.</p>

Asymmetric Synthesis Involving Reversible Photodimerization of a Prochiral Flavonoid Followed by Crystallization

Hiroki Ishikawa Naohiro Uemura Fumitoshi Yagishita Nozomi Baba Yasushi Yoshida Takashi Mino Yoshio Kasashima Masami Sakamoto

European Journal of Organic Chemistry 2017(46) 6878-6881 2017年12月 [査読有り]

Asymmetric synthesis involving photochemical dimerization of a prochiral flavonoid derivative in solution without any chiral source was achieved. Irradiation of ethyl 6-bromochromonecarboxylate in solution efficiently gave a C-2-chiral anti-head-t...

Asymmetric Synthesis by Using Natural Sunlight under Absolute Achiral Conditions

Masami Sakamoto Koh Shiratsuki Naohiro Uemura Hiroki Ishikawa Yasushi Yoshida Yoshio Kasashima Takashi Mino

Chemistry - A European Journal 23(7) 1717-1721 2017年1月 [査読有り]

Irradiation of prochiral (E)-aroylacrylamide with sunlight gave single-handed pyrrolinone quantitatively and with an enantiomeric excess (ee) of over 99% under absolutely achiral conditions. The phenomenon was explained by photoisomerization and r...