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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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Paper | Regular issue | Vol 106, No. 4, 2023, pp.664-679
Published online, 10th March, 2023■ Synthesis of 1,2-Dicarbonyls from Five-Membered Cyclic Enamines and Arylglyoxal Hydrates under Metal-Free Conditions
Published online, 10th March, 2023
DOI: 10.3987/COM-23-14827
■ Synthesis of 1,2-Dicarbonyls from Five-Membered Cyclic Enamines and Arylglyoxal Hydrates under Metal-Free Conditions
Wei Fan*
*Science and Technology Office, Chuzhou City Vocation College, Chuzhou, 239000, Anhui, P. R. China
Abstract
An efficient and practical protocol for O2-enabled oxidative 1,2-dicarbonylation of five-membered cyclic enamines with arylglyoxal hydrates is developed, producing 32 examples of functionalized 1,2-dicarbonyls in good to excellent yields. Notable features of this transformation include wide substrate scope, excellent yields and metal-free conditions as well as O2 from air as the green oxidant with H2O as sole by-product.
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