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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
Editor
May 11, 2023
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Review | Regular issue | Vol 26, No. 9, 1987, pp.2503-2518
Published online, 1st January, 1970■ X-Ray Crystal Structures of C19-Diterpenoid Alkaloids
Published online, 1st January, 1970
DOI: 10.3987/R-1987-09-2503
■ X-Ray Crystal Structures of C19-Diterpenoid Alkaloids
Balawant S. Joshi and S. William Pelletier
*Department of Chemistry, Institute for Natural Products Research, The University of Georgia, Chemistry Building, Athens, Georgia 30602-2556, U.S.A.
Abstract
The X-ray diffraction analysis of 30 C19-diterpenoid alkaloids is reviewed. During the course of structure determination, many naturally-occurring alkaloids have been correlated with alkaloids whose structures were established by X-ray crystal studies. The relative stereochemistry of these alkaloids at all the centres can be assumed to be correct. The absolute stereochemistry has been established for some of the alkaloids.
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