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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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Communication | Regular issue | Vol 55, No. 12, 2001, pp.2283-2287
Published online, 1st January, 1970■ A Facile Synthesis of 4(3H)-Pyrimidinones via [4+2] Cycloaddition Utilizing Trimethylsilylketene
Published online, 1st January, 1970
DOI: 10.3987/COM-01-9374
■ A Facile Synthesis of 4(3H)-Pyrimidinones via [4+2] Cycloaddition Utilizing Trimethylsilylketene
Shigeru Arai, Takuya Sakurai, Hitomi Asakura, Shin-ya Fuma, Takayuki Shioiri,* and Toyohiko Aoyama*
*Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
Abstract
The [4+2]cycloaddition reaction utilizing trimethylsilylketene with 1,3-diaza-1,3-dienes smoothly proceeded to give the desired cycloadducts, 4(3H)-pyrimidinones, in moderate to high yields.
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