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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
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May 11, 2023
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Communication | Regular issue | Vol 22, No. 11, 1984, pp.2443-2447
Published online, 1st January, 1970■ Synthesis of E- and Z-1,6-Dioxaspiro[4.5]decanes
Published online, 1st January, 1970
DOI: 10.3987/R-1984-11-2443
■ Synthesis of E- and Z-1,6-Dioxaspiro[4.5]decanes
Chuzo Iwata,* Hiroshi Atarashi, Katsuya Nakamura, and Shuji Uchida
*Faculty of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Toyonaka, Osaka 560-0043, Japan
Abstract
An efficient synthesis of E- and Z-1,6-dioxaspiro[4.5]decanes has been achieved via the intramolecular ketallization of 5 bearing a bulky substituent(SPh) at the position α to the carbonyl group.
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