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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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Report | Regular issue | Vol 23, No. 5, 1985, pp.1219-1224
Published online, 1st January, 1970■ Antiinflammatory 2,3-Dihydro-1H-pyrrolizins. II: Addition of 6,7-Diphenyl-2,3-dihydro-1H-pyrrolizine to Domethyl Acetylenedicarboxylate and Diethyl Azosicarboxylate
Published online, 1st January, 1970
DOI: 10.3987/R-1985-05-1219
■ Antiinflammatory 2,3-Dihydro-1H-pyrrolizins. II: Addition of 6,7-Diphenyl-2,3-dihydro-1H-pyrrolizine to Domethyl Acetylenedicarboxylate and Diethyl Azosicarboxylate
Gerd Dannhardt* and Ludwig Steindl
*Naturwissenschaftliche Fakultät IV, Universität Regensburg, Universitätsstraße 31, D-93040 Regensburg , Germany
Abstract
The addition of the litle compound to the acetylene and the azo derivative,resp., leads to C5 functionalized dihydropyrrolizines. Competitive 1 : 1 and 1 : 2 adduct formation is observed using the diethyl azodicarboxylate. A significant antiinflammatory activity is shown for the 5-hydrazopyrrolizine derivative (1 : 1-adduct) .
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