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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
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January 13, 2023
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Paper | Regular issue | Vol 45, No. 1, 1997, pp.107-118
Published online, 1st January, 1970■ Synthesis of Pyrido[2,3-b]pyrazines from Pyrido[2,3-c]furoxan
Published online, 1st January, 1970
DOI: 10.3987/COM-96-7640
■ Synthesis of Pyrido[2,3-b]pyrazines from Pyrido[2,3-c]furoxan
Tohru Takabatake, Tomoyuki Miyazawa, and Minoru Hasegawa*
*College of Pharmacy, Nihon University, 7-7-1 Narashinodai, Funabashi-shi, Chiba 274-8555, Japan
Abstract
The synthesis of substituted pyrido[2,3-b]pyrazines was carried out. Pyrido[2,3-b]pyrazine 1,4-dioxides (3) and pyrido[2,3-b]pyrazine 1-oxides (4) were obtained from pyrido[2,3-c]furoxan (1) and 1,3-diketones or β-keto esters catalyzed by silica gel, alumina, or molecular sieves.
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