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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
Editor
January 13, 2023
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Paper | Regular issue | Vol 26, No. 10, 1987, pp.2691-2701
Published online, 1st January, 1970■ Catalytic Hydrogenation of 2,5-Dialkylpyrazines and 3,6-Dialkyl-2-hydroxypyrazines
Published online, 1st January, 1970
DOI: 10.3987/R-1987-10-2691
■ Catalytic Hydrogenation of 2,5-Dialkylpyrazines and 3,6-Dialkyl-2-hydroxypyrazines
Akihiro Ohta, Yukari Okuwaki, Tsuyoshi Komaru, Mieko Hisatome, Yasushi Yoshida, Jun Aizawa, Yumi Nakano, Hiroko Shibata, Takuya Miyazaki, and Tokuhiro Watanabe
*Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
Abstract
Hydrogenation of several 2,5-dialkylpyrazines and 3.6-dialkyl-2-hydroxypyrazines was achieved in the presence of platinum oxide. In the former cases, the corresponding trans piperazines were mainly obtained. In the latter cases, the products were further treated with lithium aluminum hydride to give mainly the cis isomers.
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