Synthesis of Azahelicenes via Friedel-Crafts-Type Ring-Closing Reaction of Axially Chiral Compounds
Sonau Oikawa; Yuki Utsugi; Osamu Ohno; Eiko Yasui
Asian journal of organic chemistry, 09 May 2024, [Reviewed]
Corresponding
Highly effective one pot reaction from α-hydrazonoesters to give ,anilinoesters via α-diazoesters
Tomoki Kanuma; Eiko Yasui *
Tetrahedron Letters, 07 Feb. 2024, [Reviewed]
Corresponding
Synthesis and Evaluation of DHMEQ Derivatives with Tertiary Hydroxyl Group Instead of Secondary Hydroxyl Group
Yoshimasa Imanishi; Takuro Terasaki; Takuya Sano; Osamu Ohno; Eiko Yasui
Chemical and Pharmaceutical Bulletin, 01 Apr. 2023, [Reviewed]
Corresponding
Visible-light-induced superhydrophilicity of crystallized WO3 thin films fabricated by using a newly isolated W6+ complex salt of citric acid
Taishi Murayama; Mitsunobu Sato; Hiroki Nagai; Eiko Yasui
Nanoscale Advances, 07 Mar. 2023, [Reviewed]
Synthesis of α-diazoesters from α-hydrazonoesters: Utilization of α-hydrazonoesters and α-diazoesters for convenient interconversion
Eiko Yasui; Kanako Ishimine; Sohta Nitanai; Nanami Hatakeyama; Shinji Nagumo
Tetrahedron Letters, 21 Mar. 2022, [Reviewed]
Lead, Corresponding
Chemical switching in reaction behavior of azine: Synthesis of a novel thienodiazepine derivative
Kaoru Ohtake; Jyunpei; Tsuda; Kazuhiko Takatori; Shinji Nagumo; Eiko Yasui
Tetrahedron Letters, 11 May 2021, [Reviewed]
Corresponding
Unique ring expansion of a 6-3 bicyclic ring system forming a functionalized 7-membered ring accelerated by nitrogen functional groups
Eiko Yasui; Rio Ootsuki; Kan Takayama; Shinji Nagumo
Tetrahedron Letters, 09 Aug. 2017, [Reviewed]
Lead
Selective mono-reduction of pyrrole-2,5 and 2,4-dicarboxylates
Eiko Yasui; Jyunpei Tsuda; Satoshi Ohnuki; Shinji Nagumo
Chemical and Pharmaceutical Bulletin, 01 Sep. 2016, [Reviewed]
Ring opening of disubstituted epoxides linked to a secondary oxygen group with an organocopper reagent
Naoki Terayama; Shodai Ushijima; Eiko Yasui; Masaaki Miyashita; Shinji Nagumo
Tetrahedron Letters, 26 Nov. 2014, [Reviewed]
Synthesis and Evaluation of a Cyclopropane Derivative of DHMEQ
Eiko Yasui; Kan Takayama; Takahiro Nakago; Nobuyuki Takeda; Yasutada Imamura; Shinji Nagumo
Chemical and Pharmaceutical Bulletine, Mar. 2014, [Reviewed]
Lead
A novel method for the synthesis of 3,4-disubstitutedpyrrole-2,5-dicarboxylates from alpha-diazo esters
Eiko Yasui; Masao Wada; Shinji Nagumo; Norio Takamura
Tetrahedron, May 2013, [Reviewed]
Lead
Synthesis of 1-(4-Aminobutyl)-2-iminoimidazolidin-4-one Aimed at Preparation of a Creatinine-Specific Antibody
Shun-suke Moriya; Naoki Terayama; Kyoko Hiramatsu; Masao Kawakita; Tatsuya Kiryu; Takato Kawanishi; Eiko Yasui; Shinji Nagumo
Chemical and Pharmaceutical Bulletin, Apr. 2012, [Reviewed]
Tandem five membered-ring selective Prins reaction and Friedel–Crafts reaction
Yuji Suzuki; Takanori Niwa; Eiko Yasui; Megumi Mizukami; Masaaki Miyashita; Shinji Nagumo
Tetrahedron Letters, Mar. 2012, [Reviewed]
Synthetic studies of venturicidins: stereoselective synthesis of the C15–C27 segment based on two types of stereospecific epoxide opening reactions
Yuji Suzuki; Shinji Nagumo; Eiko Yasui; Megumi Mizukami; Masaaki Miyashita
Tetrahedron Letters, Nov. 2011, [Reviewed]
Synthetic Studies of the Lichen Macrolide Lepranthin. Stereoselective Synthesis of Diolide Framework Based on Regioselective Epoxide-Opening Reaction
Hisashi Takada; Shinji Nagumo; Eiko Yasui; Megumi Mizukami; Masaaki Miyashita
Chem. Pharm. Bull., Apr. 2011, [Reviewed]
Friedel-Crafts reaction of vinylaziridine linked to an ester group
Takada, Hisashi; Yasui, Eiko; Sahara, Yui; Chinen, Yuki; Tanaka, Hirotoshi; Morita, Yusuke; Kobiki, Chihiro; Narisawa, Daiki; Mizukami, Megumi; Miyashita, Masaaki
Heterocycles, Feb. 2011, [Reviewed]
Synthetic studies of lepranthin, a lichen-produced dimeric macrolide. Stereoselective synthesis of a seco-acid based on stereospecific epoxide-opening reactions
Takada, Hisashi; Nagumo, Shinji; Yasui, Eiko; Mizukami, Megumi; Miyashita, Masaaki
Heterocycles, Jan. 2011, [Reviewed]
Development of novel pyrrole synthesis for the preparation of intermediates of bioactive pyrrole alkaloids.
Yasui, Eiko; Wada, Masao; Takamura, Norio
Tetrahedron Letters, Jul. 2009, [Reviewed]
Lead
Novel method for synthesis of aryl hydrazones from alpha-diazo esters: scope and limitations of nucleophiles.
Yasui, Eiko; Wada, Masao; Takamura, Norio
Tetrahedron, Jan. 2009, [Reviewed]
Lead
New entry for synthesis of N-acylhydrazones, pyridazinones, and 1,3,4-oxadiazin-6-ones from amino acid esters.
Yasui, Eiko; Wada, Masao; Takamura, Norio
Chem. Pharm. Bull., Nov. 2007, [Reviewed]
Lead
Synthesis and evaluation of fluorogenic reagents for simultaneous detection of peptides and proteins by HPLC in two different samples.
Saimaru, Hiroshi†; Yasui, Eiko†; Takamura, Norio; Imai, Kazuhiro; †These authors equally contributed; o the research
Biomedical Chromatography, Jun. 2006, [Reviewed]
Lead
Novel approach to arylhydrazones, the precursor for Fischer indole synthesis, via diazo esters derived from amino acid esters.
Yasui, Eiko; Wada, Masao; Takamura, Norio
Tetrahedron Letters, Jan. 2006, [Reviewed]
Lead
A new fluorogenic reagent aimed at simultaneous determination of peptides or proteins in two different samples.
Saimaru, Hiroshi; Masuda, Mayumi; Toriumi, Chifuyu; Santa, Tomofumi; Ichikawa, Eiko; Takamura, Norio; Imai, Kazuhiro
Journal of Materials Chemistry, Jul. 2005, [Reviewed]
Reversal of anticancer drug resistance by COTC based on intracellular glutathione and glyoxalase I.
Kamiya, Daisuke; Uchihata, Yuki; Ichikawa, Eiko; Kato, Kuniki; Umezawa, Kazuo
Bioorganic & Medicinal Chemistry Letters, Feb. 2005, [Reviewed]
New Entries in Lewis Acid-Lewis Base Bifunctional Asymmetric Catalyst: Catalytic Enantioselective Reissert Reaction of Pyridine Derivatives.
Ichikawa, Eiko; Suzuki, Masato; Yabu, Kazuo; Albert, Matthias; Kanai, Motomu; Shibasaki, Masakatsu
Journal of the American Chemical Society, Sep. 2004, [Reviewed]
Lead
Synthesis of sugar-modified derivatives of the unusual nucleoside oxanosine and its carbocyclic analogs as potential inhibitors of HIV.
Saito, Yoshio; Nakamura, Mariko; Ohno, Tsuneya; Chaicharoenpong, Chanya; Ichikawa, Eiko; Yamamura, Shosuke; Kato, Kuniki; Umezawa, Kazuo
Journal of the Chemical Society, Perkin Transactions 1, Mar. 2000, [Reviewed]
Syntheses of oxanosine and carbocyclic oxanosine derivatives as anti-HIV agents.
Saito, Yoshio; Nakamura, Mariko; Ohno, Tsuneya; Chaicharoenpong, Chanya; Ichikawa, Eiko; Yamamura, Shosuke; Kato, Kuniki; Umezawa, Kazuo
Journal of Antibiotics, Nov. 1999, [Reviewed]
Synthesis of enantiomerically pure 9-[(1'R,2'R,3'S)-bis(hydroxymethyl)thietan-1'-yl]adenine, 3'-thio analog of oxetanocin A.
Ichikawa, Eiko; Yamamura, Shosuke; Kato, Kuniki
Tetrahedron Letters, Oct. 1999, [Reviewed]
Lead
2',3'-dideoxy-3'-C-(hydroxymethyl)-4'-thiopentofuranosyl nucleosides as potential antiviral agent.
Ichikawa, Eiko; Yamamura, Shosuke; Kato, Kuniki
Bioorganic & Medicinal Chemistry Letters, Apr. 1999, [Reviewed]
Lead
