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Obituary
Yoshito Kishi (1937-2023)
Yoshito Kishi (1937-2023)
Professor. Yoshito Kishi,
a member of the Honorary Editorial Associates of HETEROCYCLES,
has passed away on January 9, 2023 at the age of 85.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
January 13, 2023
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Communication | Regular issue | Vol 2, No. 5, 1974, pp.595-599
Published online, 1st January, 1970■ Ratio of Seven- to Six-membered Ring Sulfones in the Cyclization of a Sulfonyl Carbene
Published online, 1st January, 1970
DOI: 10.3987/R-1974-05-0595
■ Ratio of Seven- to Six-membered Ring Sulfones in the Cyclization of a Sulfonyl Carbene
Rudolph A. Abramovitch* and Vazken Alexanian
*Department of Chemistry, University of Alabama, Box 870336, University
Tuscaloosa, Alabama 35478-0336, U. S. A.
Abstract
The ratio of 7- to 6-membered ring intramolecular cyclization product increases with decreasing solvent polarity in the (C6F5Cu)4 catalyzed decomposition of 1 and with increasing temperature in the uncatalyzed decompositions. Possible explanations are discussed.
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