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Obituary
Zenichi Yoshida (1925-2023)
Zenichi Yoshida (1925-2023)
Professor. Zenichi Yoshida,
a member of the Honorary Advisors of HETEROCYCLES (1975-1998),
has passed away on May 4, 2023 at the age of 97.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
May 11, 2023
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Communication | Regular issue | Vol 12, No. 8, 1979, pp.1001-1004
Published online, 1st January, 1970■ Synthesis of a Novel Heterocyclic System, Indolo[2’,3’:5,6][1,2,4]triazino[2,3-a]benzimidazole
Published online, 1st January, 1970
DOI: 10.3987/R-1979-08-1001
■ Synthesis of a Novel Heterocyclic System, Indolo[2’,3’:5,6][1,2,4]triazino[2,3-a]benzimidazole
William A. Romanchick and Madeleine M. Joullié*
*Department of Chemistry, University of Pennsylvania, 231 South 34th Street Philadelphia, PA 19104-6323, U.S.A.
Abstract
The incorporation of both the benzimidazole and triazinoindole moieties in a new ring system has been accomplished via the condensation of 1,2-diaminobenzimidazoles with various isatins. The alkylation of one of the products (4a) was investigated.
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