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Obituary
Yoshito Kishi (1937-2023)
Yoshito Kishi (1937-2023)
Professor. Yoshito Kishi,
a member of the Honorary Editorial Associates of HETEROCYCLES,
has passed away on January 9, 2023 at the age of 85.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
January 13, 2023
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Communication | Regular issue | Vol 26, No. 2, 1987, pp.355-358
Published online, 1st January, 1970■ Palladium Catalyzed Coupling of 5-Hydroxyuracil Trifluoromethanesulfonates (Triflates) with Alkenes and Alkynes
Published online, 1st January, 1970
DOI: 10.3987/R-1987-02-0355
■ Palladium Catalyzed Coupling of 5-Hydroxyuracil Trifluoromethanesulfonates (Triflates) with Alkenes and Alkynes
Kosaku Hirota, Yukio Kitade, Yoshiaki Isobe, and Yoshifumi Maki
*Labolatory of Medicinal Chemistry, Gifu Pharmaceutical University, 6-1 Mitahora-higashi 5-chome, Gifu 502-8585, Japan
Abstract
Cross coupling of 5-hydroxyuracil triflates (1) with alkenes and alkynes in the presence of a palladium catalyst and triphenylphosphine affords 5-vinyluracils (2) and 5-alkynyluracils (3), respectively, in good yields. Coupling of the triflate (1a) with organocopper reagents [R2Cu(CN)Li2] is also described.
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