In recent years, development of eco-friendly synthetic methods has been required in synthetic organic chemistry. In such a demanding environment, we have been working on reducing the environmental impact of the practical application of drug discovery process.
1 . We have studied the environment- and human-friendly oxidation process with "light", representative clean energy, and "molecular oxygen". Up to now, we found the oxidation of methyl group on the aromatic ring using a bromine source as catalyst, tandem oxidative rearrangement using iodine source, and variety of photooxidative reaction. In addition, we focused on the photooxidation using an organocatalyst. These reactions are environmental-and human-friendly oxidation due to its heavymetal-free process.
2 . We have studied the synthesis of natural products using synthetic reaction we developed and efficient synthesis of biologically active compounds.
3 . We have studied the reaction with nickel and iron catalyst, which are inexpensive and have unique reactivity, instead of expensive transition metals.
4 . We have studied the synthesis of the highly reactive hypervalent iodine compounds and the development of new reactions using them.
研究課題 Research Objectives
分子状酸素を利用する環境負荷低減型酸化反応の開発 Studies of environmentally-friendly oxidation using molecular oxygen
光を利用する環境負荷低減型新規反応の開発 Studies of environmentally-friendly new reactions using light
天然物および生物活性化合物の合成研究 Synthesis of natural products and biologically active compounds
ニッケルや鉄触媒を用いる新規反応の開発 Studies of new reactions with nickel and iron catalysts
最近の研究成果 Research Results
Takeda, M., Maejima, S., Yamaguchi, E., Itoh, A., Iodine-mediated direct a-amination of dimethyl methylmalonate using non-protected amines, Tetrahedron Lett., 77, 153251 (2021).
Takai, R., Shimbo, D., Tada, N., Itoh, A., Ligand-enabled copper-catalyzed N-alkynylation of sulfonamide with alkynyl benziodoxolone: synthesis of amino acid-derived ynamide, J. Org. Chem., 86, 4699-4713 (2021).
Shimbo, D., Maruyama, T., Tada, N., Itoh, A., N-Alkenylation of hydroxamic acid derivatives with ethynyl benziodoxolone to synthesize cis-enamides through vinyl benziodoxolones, Org. Biomol. Chem., 19, 2442-2447 (2021).
Maejima, S., Yamaguchi, E., Itoh, A., Three-Component Iminolactonization Reaction via Bifunctionalization of Olefins Using Molecular Iodine and Visible Light, J. Org. Chem., 85, 10709-10718 (2020).
Matsuo, K., Yamaguchi, E., Itoh, A., In Situ-Generated Halogen-Bonding Complex Enables Atom Transfer Radical Addition (ATRA) Reactions of Olefins, J. Org. Chem., 85, 10574-10583 (2020).