Volume 9, Issue 4 p. 652-659
Full Paper

Chiral Tetraarylmethane Derivative with Metal-Coordinating Ability

Prof. Dr. Kouzou Matsumoto

Corresponding Author

Prof. Dr. Kouzou Matsumoto

Institute of Natural Sciences, Senshu University, 2-1-1 Higashimita, Kawasaki, Kanagawa, 214-8580 Japan

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Kaori Miki

Kaori Miki

Department of Chemistry Graduate School of Science, Osaka University, 1-1 Machikaneyamacho Toyonaka, Osaka, 560-0043 Japan

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Rina Tanaka

Rina Tanaka

Department of Chemistry Graduate School of Science, Osaka University, 1-1 Machikaneyamacho Toyonaka, Osaka, 560-0043 Japan

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Takahiro Matsuda

Takahiro Matsuda

Faculty of Integrated Arts and Sciences, Hiroshima University, 1-7-1 Kagamiyama, Higashi-hiroshima, 739-8521 Japan

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Dr. Tatsuo Nehira

Corresponding Author

Dr. Tatsuo Nehira

Graduate School of Integrated Sciences for Life, Hiroshima University, 1-7-1 Kagamiyama, Higashi-hiroshima, 739-8521 Japan

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Dr. Yasukazu Hirao

Dr. Yasukazu Hirao

Department of Chemistry Graduate School of Science, Osaka University, 1-1 Machikaneyamacho Toyonaka, Osaka, 560-0043 Japan

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Prof. Dr. Hiroyuki Kurata

Prof. Dr. Hiroyuki Kurata

Organization for Fundamental Education, Fukui University of Technology, 3-6-1 Gakuen, Fukui, 910-8505 Japan

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Prof. Gennaro Pescitelli

Prof. Gennaro Pescitelli

Department of Chemistry, via Moruzzi 13, University of Pisa, 56124 Pisa, Italy

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Prof. Dr. Takashi Kubo

Prof. Dr. Takashi Kubo

Department of Chemistry Graduate School of Science, Osaka University, 1-1 Machikaneyamacho Toyonaka, Osaka, 560-0043 Japan

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First published: 23 January 2020
Citations: 4

Abstract

Phenyl-pyrazinyl-2-pyridyl-2-pyrimidinylmethane (1) has been synthesized in four steps from 2-(chloromethyl)pyridine. This compound is chiral and expected to show metal-coordinating ability because three of four aryl groups have the nitrogen atom at ortho-position with respect to the central carbon atom. The X-ray crystallographic analysis of rac-1 unambiguously revealed the tetraarylmethane framework, but the nitrogen atoms could not be assigned. The optical resolution of 1 was achieved by chiral HPLC. Besides the CD spectra of the two fractions exhibited opposite signs as expected, the solvent effect on the CD spectra was also observed. According to the calculated CD curve based on time-dependent density functional theory (TDDFT) method, the first eluted fraction is the R isomer in terms of absolute configuration. It should be noted that the CD spectrum of 1 was also changed by the addition of the transition metal ions because of the formation of the metal complexes of 1. The Job plot and the electrospray ionization (ESI) mass spectrum of the solution of rac-1 in the presence of Cu2+ ion revealed that the stoichiometry of 1 and Cu2+ was 2 : 1.

Conflict of interest

The authors declare no conflict of interest.