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Zenichi Yoshida (1925-2023)
Zenichi Yoshida (1925-2023)
Professor. Zenichi Yoshida,
a member of the Honorary Advisors of HETEROCYCLES (1975-1998),
has passed away on May 4, 2023 at the age of 97.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
May 11, 2023
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Paper | Special issue | Vol 47, No. 2, 1998, pp.717-724
Published online, 1st January, 1970■ Photolysis of 13C-Methylcobalamin. Direct Detection of Generated Formaldehyde by Using 13C-Labeling
Published online, 1st January, 1970
DOI: 10.3987/COM-97-S(N)43
■ Photolysis of 13C-Methylcobalamin. Direct Detection of Generated Formaldehyde by Using 13C-Labeling
Kazuhiko Takatori, Yoshifumi Nakajima, Miyako Hirose, and Masahiro Kajiwara*
*Department of Medicinal Chemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan
Abstract
Photolysis of methylcobalamin was followed by UV, CD and 1H-NMR spectroscopic methods. The direct detection of formaldehyde as a photolysis product was achieved by 13C-NMR using 13C-methylcobalamin, prepared from vitamin B12 and 13C-methyl iodide, as a substrate.
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