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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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Communication | Regular issue | Vol 27, No. 7, 1988, pp.1569-1574
Published online, 1st January, 1970■ Effects of the Ring Size on the Regioselectivity of Amino-Claisen Rearrangement of Unsymmetrically Fused Anilinium Derivatives
Published online, 1st January, 1970
DOI: 10.3987/COM-88-4546
■ Effects of the Ring Size on the Regioselectivity of Amino-Claisen Rearrangement of Unsymmetrically Fused Anilinium Derivatives
Hajime Katayama* and Kimiyoshi Kaneko
*Niigata College of Pharmacy, 5-13-2 Kamishin‘ei-cho, Niigata 590-2081, Japan
Abstract
The site of meta rearrangement in quaternary amino-Claisen rearrangement is found to be controlled by the size of the fused rings. This regioselectivity is also predictable from the magnitudes of the chemical shifts differences between the two meta carbons.
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