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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 19, No. 4, 1982, pp.687-690
Published online, 1st January, 1970■ Synthesis of 3-Methylxanthosine
Published online, 1st January, 1970
DOI: 10.3987/R-1982-04-0687
■ Synthesis of 3-Methylxanthosine
Taisuke Itaya and Tsunehiro Harada
*Faculty of Pharmaceutical Scicences, Kanazawa University, 13-1 Takara-machi, Kanazawa 920-0934, Japan
Abstract
Treatment of 1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-5-(methylamino)imidazole-4-carboxamide (VIb) with EtOCOCl followed by cyclization with 1 N NaOH gave 3-methylxanthosine (Va). The glycosidic bond of Va underwent acid hydrolysis at a rate more than 1000 times greater than that of xanthosine.
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