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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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Report | Regular issue | Vol 23, No. 8, 1985, pp.2025-2034
Published online, 1st January, 1970■ A Facile Synthesis of Novel Tricyclic Compounds, Tetrazoloquinoxalines and 1,2,4-Triazoloquinoxalines
Published online, 1st January, 1970
DOI: 10.3987/R-1985-08-2025
■ A Facile Synthesis of Novel Tricyclic Compounds, Tetrazoloquinoxalines and 1,2,4-Triazoloquinoxalines
Kenji Makino,* Gozyo Sakata, Katsushi Morimoto, and Yoshinori Ochiai
*Central Research Institute, Nissan Chemical Industries Ltd., 722-1 Tsuboicho, Funabashi, Chiba 274-8507, Japan
Abstract
Novel 5-methyltetrazolo[1,5-a]quinoxalin-4-ones (5) and 5-methyl-1,2,4-triazolo[4,3-a]quinoxalin-4-ones (7) could be synthesized from 1-methyl-3-chloroquinoxalin-2-ones (3) and 1-methyl-3-hydrazinoquinoxalin-2-ones (6), respectively. Further extensive study was carried out to synthesize 4- or 7-substituted and 4,7-disubstituted tetrazolo[1,5-a]quinoxalines (10) and 1,2,4-triazolo[4,3-a]quinoxalines (12).
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