HETEROCYCLES
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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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Note | Regular issue | Vol 55, No. 12, 2001, pp.2397-2404
Published online, 1st January, 1970■ Bidirectional Conversion of Galanthamine and Crinine Type Heterocycles
Published online, 1st January, 1970
DOI: 10.3987/COM-01-9332
■ Bidirectional Conversion of Galanthamine and Crinine Type Heterocycles
Matthias Treu, Stefan Welzig, and Ulrich Jordis*
*Institute of Organic Chemistry, Vienna University of Technology, Getreidemarkt 9/154, A-1060 Vienna, Austria
Abstract
The conversion of galanthamine-type molecules into crinine-type compounds and vice versa has been accomplished by a ring opening-Michael addition-cascade of a galanthamine-type secondary amine and a crinine-type quarternary ammonium salt.
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