Kan Wakamatsu, Associate Professor

Japanese Page

Doctor of Science (Tohoku University, 1994)

My research theme is about the development of novel photochemical reactions, especially concerned with photoinduced electron transfer (PET) reactions, in organic compounds. For past years I have mainly studied electrocycloreversion of cyclobutene cation radicals, photooxygenation and photoisomerization of 1,3-butadienes via PET, and bond cleavage in diene- or arene-endoperoxide cation radicals. My current research interests are the investigation on mechanisms for formally pericyclic rearrangements in ion radicals of organic compounds containing heteroatoms, e.g. thiocyanates, sulfenates, and sulfoxides, and their synthetic applications.

Keywords:

Photochemistry, Organic Chemistry (Photoinduced Electron Transfer, Charge-Transfer Complex, Reaction Mechanism, Molecular Orbital Calculation)

• Jing-Kun Fang, De-Lie An, Kan Wakamatsu, Takeharu Ishikawa, Tetsuo Iwanaga, Shinji Toyota, Daisuke Matsuo, Akihiro Orita, and Junzo Otera, "Synthesis and spectroscopic study of diphenylamino-substituted phenylene-(poly)ethynylenes: remarkable effect of acetylenic conjugation modes," Tetrahedron Lett. 2010, 51, 917-920.
• Shinji Toyota, Hiroyuki Onishi, Kan Wakamatsu, and Tetsuo Iwanaga, "Enantiopure 1,8-Anthrylene Dimer with Acetylene Linkers and an Intraannular Alkyl Group," Chem. Lett. 2009, 38, 350-351.
• Shinji Toyota, Hiroyuki Onishi, Yoshihiro Kawai, Takaaki Morimoto, Hiroaki Miyahara, Tetsuo Iwanaga, and Kan Wakamatsu, "Stereogenic Motif Consisting of Rigid Ring and Intraannular Chains: Isolation and Structures of Stereoisomers of 9-Alkyl-1,8-anthrylene-Butadiynylene Cyclic Dimers," Org. Lett. 2009, 11, 321-324.
• Shinji Toyota, Hiroaki Miyahara, Michio Goichi, Kan Wakamatsu, and Tetsuo Iwanaga, "Chemistry of Anthracene-Acetylene Oligomers. X. Synthesis, Structures, and Properties of 1,8-Anthrylene-Alkynylene Cyclic Trimers," Bull. Chem. Soc. Jpn. 2008, 81, 1147-1157.
• Kan Wakamatsu, Akihiro Orita, and Junzo Otera, "Evaluation of Tin-Oxygen Bond Association by Means of ab initio Molecular Orbital Calculations," Organometallics 2008, 27, 1092-1097.
• Guang Shao, Akihiro Orita, Koji Nishijima, Kanako Ishimaru, Makoto Takezaki, Kan Wakamatsu, Rolf Gleiter, and Junzo Otera, "Synthesis and spectroscopic studies of arylethynylsilanes," Chem. Asian J. 2007, 2, 489-98.
• Michio Goichi, Shingo Yamasaki, Hiroaki Miyahara, Kan Wakamatsu, Haruo Akashi, and Shinji Toyota, "Enantiomeric Resolution of Chiral 1,8-Anthrylene Cyclic Tetramers with Acetylene and Diacetylene Linkers," Chem. Lett. 2007, 36, 404-405.
• Guang Shao, Akihiro Orita, Koji Nishijima, Kanako Ishimaru, Makoto Takezaki, Kan Wakamatsu, and Junzo Otera, "Photoluminescence Enhancement in Tetrakis(arylethynyl)silanes," Chem. Lett. 2006, 35, 1284-1285.
• Shinji Toyota, Keiko Kaneko, Megumi Kurokawa, and Kan Wakamatsu, "Facile formation of acenaphtho[1,2-a]pyrene structures by thermal isomerization of bis(8-ethynyl-1-naphthyl)ethynes," Tetrahedron Lett. 2006, 47, 7349-7352.
• Shinji Toyota, Akinori Takau, Yo Hitaka, Michinori Oki, and Kan Wakamatsu, "Enantiomeric Resolution and Absolute Stereochemistry of Stable Rotamers of Dimethyl 6,6'-Dimethyl-9,9'-bitriptycyl-2,2'-dicarboxylate as a Stereochemical Analog of (R*,R*)- and (R,S)-Tartaric Acids," Bull. Chem. Soc. Jpn. 2005, 78, 2228-2234.
• Kan Wakamatsu, Mitsuru Kouda, Kazuyoshi Shimaoka, and Haruo Yamada, "Photochemical deprotection of nitro-substituted benzenesulfenates via photoinduced electron transfer," Tetrahedron Lett. 2004, 45, 6395-6398.
• Kan Wakamatsu, "Quinone imine dye formation via photocycloaddition between isocyanates and chloranil," Tetrahedron Lett. 2004, 45, 4627-4630.
• Akihiro Orita, Takehiro Nakano, De Lie An, Kazumi Tanikawa, Kan Wakamatsu, and Junzo Otera, "Metal-Assisted Assembly of Pyridine-Containing Arylene Ethynylene Strands to Enantiopure Double Helicates," J. Am. Chem. Soc. 2004, 126, 10389-10396.
• Shinji Toyota, Toshiaki Shimasaki, Takashi Ueda, Naoki Tanifuji, and Kan Wakamatsu, "Absolute Stereochemisty and Chiroptical Properties of 3,3'-Bis(methoxycarbonyl)-9,9'-bianthryl," Bull. Chem. Soc. Jpn. 2004, 77, 2065-2070.
• Shinji Toyota, Toshiaki Shimasaki, Naoki Tanifuji, and Kan Wakamatsu, "Experimental and theoretical investigations of absolute stereochemistry and chiroptical properties of enantiopure 2,2'-substituted 9,9'-bianthryls," Tetrahedron: Asymmetry 2003, 14, 1623-1629.
• Seichi Okeya, Kan Wakamatsu, Takashi Shibahara, Hideo Yamakado, and Kichisuke Nishimoto, "Theoretical Study for the Site Exchange Mechanism of Anionic 5-Coordinate Pt(II) Complexes with Halide, [PtX(hfac)₂]^- (X = Cl, Br, I, hfac = hexafluoroacetylacetonate)," J. Comput. Chem. Jpn. 2002, 1, 97-102.
• Takashi Shibahara, Haruo Akashi, Masahiro Asano, Kan Wakamatsu, Kichisuke Nishimoto, and Masayasu Mori, "DFT calculation and X-ray structure of nitrosyl pentaammine chromium complex," Inorg. Chem. Commun. 2001, 4, 413-415.
• Kan Wakamatsu, Kichisuke Nishimoto, and Takashi Shibahara, "TDDFT Study of Electronic Spectra of Photochromic Dinuclear Molybdenum Complex," Inorg. Chem. Commun. 2000, 3, 677-679.
• Kan Wakamatsu, Jun Dairiki, Tetsuo Etoh, Hiroshi Yamamoto, Satoshi Yamamoto, and Yasumasa Shigetomi, "Electron-Transfer Induced Rearrangement of Thiocyanate to Isothiocyanate," Tetrahedron Lett. 2000, 41, 365-369.
• Kan Wakamatsu, Kichisuke Nishimoto, and Takashi Shibahara, "Theoretical Study of Photochromic Dinuclear Molybdenum Complexes," Inorg. Chim. Acta 1999, 295, 180-188.