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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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Communication | Regular issue | Vol 27, No. 2, 1988, pp.315-318
Published online, 1st January, 1970■ Novel Cyclization of Ethyl 2-Bromopyruvate with Dialkylthioamides of N-Protected Amino Acids: One Pot Synthesis of 1,2,3,5-Tetrasubstituted Pyrroles
Published online, 1st January, 1970
DOI: 10.3987/COM-87-4354
■ Novel Cyclization of Ethyl 2-Bromopyruvate with Dialkylthioamides of N-Protected Amino Acids: One Pot Synthesis of 1,2,3,5-Tetrasubstituted Pyrroles
Tarek S. Mansour* and Gilles Sauvé
*Biochemical Products Division, Institut Armand-Frappier, Université du Québec, 531 Boulevard de Prairies, Laval, Québec, H7V 1B7, Canada
Abstract
Reaction of ethyl 2-bromopyruvate (1) with various N-t-Boc, N-ethoxycarbonyl or N-acetyl phenylalanine or methionine dialkylthioamides under sulfur extrusion conditions gave 1,2,3,5-tetrasubstituted pyrroles in good yields.
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