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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
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May 11, 2023
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Paper | Regular issue | Vol 34, No. 8, 1992, pp.1613-1621
Published online, 1st January, 1970■ Dimerization of Indolo[1,2-b][2,7]naphthyridine-5,12-quinone
Published online, 1st January, 1970
DOI: 10.3987/COM-92-6087
■ Dimerization of Indolo[1,2-b][2,7]naphthyridine-5,12-quinone
Deborah A. Davis and Gordon W. Gribble*
*Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, U.S.A.
Abstract
Attempts to isomerize indolo[1,2-b][2,7]naphthyridine-5,12-quinone (5) to ellipticine quinone (7) with various nucleophiles (cyanide, methoxide, halide, thiophenoxide) lead instead to 6,6’-bis(indolo[1,2-b][2,7]naphthyridine-5,12-quinone) (8), the dimer of 5.
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